Can‘t pair Philips switch anymore

Hello,
Unfortunately I can no longer connect Philips switches to the gateway.
Despite resetting the switch, a connection is no longer possible.
A connection is still possible via the Philips Bridge - just not via Phoscon.
I tried using Raspbee and Conbee III - even with an empty configuration. but nothing works.
Is this a known problem of the 2.27 version?
Greetings,
Tobias

Yes.

Do you also see this problem with v2.27.1-beta?

And are the “DDF” labels shown on some nodes like in following screenshot?

Hi all, I move this topic away and would like to ask you to continue in the GitHub issue I linked.

Thanks