TRANSMIT_COMPLETE_NO_ACK aafter update

Off topic:
Yeah, there’s someting off / odd with the app update timestamps as it seems.

The app store now says ‘updated 2 days ago’, which will be @ Aug. 26th;
This corresponds with your screenshot of the app update @Paul_Planje

The changelog however, as @DirkG most probably referred to, says it’s updated @ Aug 23rd…

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On topic:

Because the changelog mentioned zwave updates, it’s possible a bug has been introduced.
The best idea for now is:
Read post # 1 of the dedicated Shelly app topic very carefully, this is one of the most extended howto/troubleshoot/FAQ posts of all apps here.
As @DirkG alr. linked to it:

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In case there’s nothing you can do about it to solve it yourself:

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But how can you find these app topics?