Suggest that you open a new issue with debug logs to Home Assistant’s core repository, but I suspect that the root cause will probably end up being interference (as wierd Zigbee problems are almost always interference with a rouge device being less common but still a possibility), again read and folllow tips here first → Zigbee networks: how to guide for avoiding interference and optimize for getting better range + coverage
Do not be suprised if the problem is simple EMF interference, I can not highlight enough how many serious problems EMF interference will cause for Zigbee!
If you are talking about the Sonoff dongles and not the SkyConnect dongle then there are steps in my threads about them with seperate threads for ZBDongle-P and ZBDongle-E, (but you must disable/stop ZHA to update firmware), see respectivly:
For SkyConnect there are instructions on Home Assistant’s webpage for SkyConnect documentation