Had no success in going back to the old ota version. There are some posts from zigbee2mqtt having also problems with this version but at least they have a way back: Xiaomi Aqara Plug (SP-EUC01/lumi.plug.maeu01) Toggles without reason · Issue #13903 · Koenkk/zigbee2mqtt · GitHub
I only updated to that firmware because it was recommendet by deCONZ… For me it seems now that I am having a “partially bricked” device and no solution nor, at my opinion, much interest to take a look at this problems. And that where I am not the only one with this issue.
The last update not only had this issue. Also my ikea lamps just being in an update loop like here mentioned from others:
Currently I am struggling what to do. On the one hand my current system kinda “works” on the other hand it seems for me to be not reliable. I think I am waiting a little bit more to see where things will end. I mean… I am not using a beta Version but it feels like one, normally I do not like running on outdated or old versions I like to keep my things up to date… But next time I will definitely wait and track github for issues before updating (Well or switching completely to ZHA/Zigbee2MQTT)