Nothing is reachable then. I just had one light and one Button. Since yesterday I also have the Aqara sensor.
None of these are reachable when it happens. But guess what? If I press my Xiaomi button, the light turns on (both marked not reachable).
Log of button which is listed as offline
20:17:53:613 Device TTL 6673 s flags: 0x7
20:18:05:822 [INFO] - Button 1000 - lumi.sensor_switch, unicast to: 0x0000, endpoint: 0x01, cluster: ONOFF (0x0006), action: Normal press, payload: 00001000, zclSeq: 62
20:18:05:822 ZCL attribute report 0x00158D0004A03879 for cluster: 0x0006, ep: 0x01, frame control: 0x18, mfcode: 0x0000
20:18:05:824 rule event /sensors/2/state/lastupdated: 0 -> 0
20:18:06:027 [INFO] - Button 1002 - lumi.sensor_switch, unicast to: 0x0000, endpoint: 0x01, cluster: ONOFF (0x0006), action: Normal release, payload: 00001001, zclSeq: 63
20:18:06:027 ZCL attribute report 0x00158D0004A03879 for cluster: 0x0006, ep: 0x01, frame control: 0x18, mfcode: 0x0000
20:18:06:029 rule event /sensors/2/state/lastupdated: 0 -> 0
20:18:06:029 trigger rule 1 - Rule TOOGLE_ON
20:18:06:297 Set sensor check interval to 1000 milliseconds
20:18:07:953 [INFO] - Button 1000 - lumi.sensor_switch, unicast to: 0x0000, endpoint: 0x01, cluster: ONOFF (0x0006), action: Normal press, payload: 00001000, zclSeq: 64
20:18:07:953 ZCL attribute report 0x00158D0004A03879 for cluster: 0x0006, ep: 0x01, frame control: 0x18, mfcode: 0x0000
20:18:07:955 rule event /sensors/2/state/lastupdated: 0 -> 0
20:18:08:160 [INFO] - Button 1002 - lumi.sensor_switch, unicast to: 0x0000, endpoint: 0x01, cluster: ONOFF (0x0006), action: Normal release, payload: 00001001, zclSeq: 65
20:18:08:160 ZCL attribute report 0x00158D0004A03879 for cluster: 0x0006, ep: 0x01, frame control: 0x18, mfcode: 0x0000
20:18:08:162 rule event /sensors/2/state/lastupdated: 0 -> 0
20:18:08:162 trigger rule 1 - Rule TOOGLE_ON
20:18:08:373 Set sensor check interval to 1000 milliseconds
20:18:09:790 [INFO] - Button 1000 - lumi.sensor_switch, unicast to: 0x0000, endpoint: 0x01, cluster: ONOFF (0x0006), action: Normal press, payload: 00001000, zclSeq: 66
20:18:09:790 ZCL attribute report 0x00158D0004A03879 for cluster: 0x0006, ep: 0x01, frame control: 0x18, mfcode: 0x0000
20:18:09:792 rule event /sensors/2/state/lastupdated: 0 -> 0
20:18:09:997 [INFO] - Button 1002 - lumi.sensor_switch, unicast to: 0x0000, endpoint: 0x01, cluster: ONOFF (0x0006), action: Normal release, payload: 00001001, zclSeq: 67
20:18:09:997 ZCL attribute report 0x00158D0004A03879 for cluster: 0x0006, ep: 0x01, frame control: 0x18, mfcode: 0x0000
20:18:09:999 rule event /sensors/2/state/lastupdated: 0 -> 0
20:18:09:999 trigger rule 1 - Rule TOOGLE_ON
20:18:10:282 Set sensor check interval to 1000 milliseconds
20:18:10:927 [INFO] - Button 1000 - lumi.sensor_switch, unicast to: 0x0000, endpoint: 0x01, cluster: ONOFF (0x0006), action: Normal press, payload: 00001000, zclSeq: 68
20:18:10:927 ZCL attribute report 0x00158D0004A03879 for cluster: 0x0006, ep: 0x01, frame control: 0x18, mfcode: 0x0000
20:18:10:928 rule event /sensors/2/state/lastupdated: 0 -> 0
20:18:11:126 [INFO] - Button 1002 - lumi.sensor_switch, unicast to: 0x0000, endpoint: 0x01, cluster: ONOFF (0x0006), action: Normal release, payload: 00001001, zclSeq: 69
20:18:11:126 ZCL attribute report 0x00158D0004A03879 for cluster: 0x0006, ep: 0x01, frame control: 0x18, mfcode: 0x0000
20:18:11:128 rule event /sensors/2/state/lastupdated: 0 -> 0
20:18:11:128 trigger rule 1 - Rule TOOGLE_ON
20:18:11:402 Set sensor check interval to 1000 milliseconds
20:18:13:159 [INFO] - Button 1000 - lumi.sensor_switch, unicast to: 0x0000, endpoint: 0x01, cluster: ONOFF (0x0006), action: Normal press, payload: 00001000, zclSeq: 70
20:18:13:159 ZCL attribute report 0x00158D0004A03879 for cluster: 0x0006, ep: 0x01, frame control: 0x18, mfcode: 0x0000
20:18:13:161 rule event /sensors/2/state/lastupdated: 0 -> 0
20:18:13:366 [INFO] - Button 1002 - lumi.sensor_switch, unicast to: 0x0000, endpoint: 0x01, cluster: ONOFF (0x0006), action: Normal release, payload: 00001001, zclSeq: 71
20:18:13:366 ZCL attribute report 0x00158D0004A03879 for cluster: 0x0006, ep: 0x01, frame control: 0x18, mfcode: 0x0000
20:18:13:368 rule event /sensors/2/state/lastupdated: 0 -> 0
20:18:13:368 trigger rule 1 - Rule TOOGLE_ON
20:18:13:579 Set sensor check interval to 1000 milliseconds
20:18:16:205 [INFO] - Button 1000 - lumi.sensor_switch, unicast to: 0x0000, endpoint: 0x01, cluster: ONOFF (0x0006), action: Normal press, payload: 00001000, zclSeq: 72
20:18:16:205 ZCL attribute report 0x00158D0004A03879 for cluster: 0x0006, ep: 0x01, frame control: 0x18, mfcode: 0x0000
20:18:16:207 rule event /sensors/2/state/lastupdated: 0 -> 0
20:18:16:412 [INFO] - Button 1002 - lumi.sensor_switch, unicast to: 0x0000, endpoint: 0x01, cluster: ONOFF (0x0006), action: Normal release, payload: 00001001, zclSeq: 73
20:18:16:412 ZCL attribute report 0x00158D0004A03879 for cluster: 0x0006, ep: 0x01, frame control: 0x18, mfcode: 0x0000
20:18:16:413 rule event /sensors/2/state/lastupdated: 0 -> 0
20:18:16:414 trigger rule 1 - Rule TOOGLE_ON
20:18:16:682 Set sensor check interval to 1000 milliseconds
20:18:18:316 [INFO] - Button 1000 - lumi.sensor_switch, unicast to: 0x0000, endpoint: 0x01, cluster: ONOFF (0x0006), action: Normal press, payload: 00001000, zclSeq: 74
20:18:18:316 ZCL attribute report 0x00158D0004A03879 for cluster: 0x0006, ep: 0x01, frame control: 0x18, mfcode: 0x0000
20:18:18:318 rule event /sensors/2/state/lastupdated: 0 -> 0
20:18:18:528 [INFO] - Button 1002 - lumi.sensor_switch, unicast to: 0x0000, endpoint: 0x01, cluster: ONOFF (0x0006), action: Normal release, payload: 00001001, zclSeq: 75
20:18:18:528 ZCL attribute report 0x00158D0004A03879 for cluster: 0x0006, ep: 0x01, frame control: 0x18, mfcode: 0x0000
20:18:18:530 rule event /sensors/2/state/lastupdated: 0 -> 0
20:18:18:530 trigger rule 1 - Rule TOOGLE_ON
20:18:18:791 Set sensor check interval to 1000 milliseconds
20:18:21:052 [INFO] - Button 1000 - lumi.sensor_switch, unicast to: 0x0000, endpoint: 0x01, cluster: ONOFF (0x0006), action: Normal press, payload: 00001000, zclSeq: 76
20:18:21:052 ZCL attribute report 0x00158D0004A03879 for cluster: 0x0006, ep: 0x01, frame control: 0x18, mfcode: 0x0000
20:18:21:054 rule event /sensors/2/state/lastupdated: 0 -> 0
20:18:21:259 [INFO] - Button 1002 - lumi.sensor_switch, unicast to: 0x0000, endpoint: 0x01, cluster: ONOFF (0x0006), action: Normal release, payload: 00001001, zclSeq: 77
20:18:21:259 ZCL attribute report 0x00158D0004A03879 for cluster: 0x0006, ep: 0x01, frame control: 0x18, mfcode: 0x0000
20:18:21:261 rule event /sensors/2/state/lastupdated: 0 -> 0
20:18:21:262 trigger rule 1 - Rule TOOGLE_ON
20:18:21:472 Set sensor check interval to 1000 milliseconds
20:18:22:327 [INFO] - Button 1000 - lumi.sensor_switch, unicast to: 0x0000, endpoint: 0x01, cluster: ONOFF (0x0006), action: Normal press, payload: 00001000, zclSeq: 78
20:18:22:328 ZCL attribute report 0x00158D0004A03879 for cluster: 0x0006, ep: 0x01, frame control: 0x18, mfcode: 0x0000
20:18:22:330 rule event /sensors/2/state/lastupdated: 0 -> 0
20:18:22:534 [INFO] - Button 1002 - lumi.sensor_switch, unicast to: 0x0000, endpoint: 0x01, cluster: ONOFF (0x0006), action: Normal release, payload: 00001001, zclSeq: 79
20:18:22:535 ZCL attribute report 0x00158D0004A03879 for cluster: 0x0006, ep: 0x01, frame control: 0x18, mfcode: 0x0000
20:18:22:537 rule event /sensors/2/state/lastupdated: 0 -> 0
20:18:22:537 trigger rule 1 - Rule TOOGLE_ON
20:18:22:802 Set sensor check interval to 1000 milliseconds
20:18:24:399 [INFO] - Button 1000 - lumi.sensor_switch, unicast to: 0x0000, endpoint: 0x01, cluster: ONOFF (0x0006), action: Normal press, payload: 00001000, zclSeq: 80
20:18:24:399 ZCL attribute report 0x00158D0004A03879 for cluster: 0x0006, ep: 0x01, frame control: 0x18, mfcode: 0x0000
20:18:24:402 rule event /sensors/2/state/lastupdated: 0 -> 0
20:18:24:606 [INFO] - Button 1002 - lumi.sensor_switch, unicast to: 0x0000, endpoint: 0x01, cluster: ONOFF (0x0006), action: Normal release, payload: 00001001, zclSeq: 81
20:18:24:606 ZCL attribute report 0x00158D0004A03879 for cluster: 0x0006, ep: 0x01, frame control: 0x18, mfcode: 0x0000
20:18:24:609 rule event /sensors/2/state/lastupdated: 0 -> 0
20:18:24:609 trigger rule 1 - Rule TOOGLE_ON
20:18:24:882 Set sensor check interval to 1000 milliseconds
20:18:53:612 Device TTL 6613 s flags: 0x7
20:19:10:960 Websocket disconnected 192.168.178.33:53835, state: 0, close-code: 1001, reason:
20:19:12:184 New websocket 192.168.178.33:53944 (state: 3)