Please note Thread & zigbee both share the same chip (called Multiprotocol) @ Pro 2023;
It’s not recommended to connect devices of both protocols. I don’t say it’s a cause of your issues, but it can be a (big) factor (Athom hasn’t pusblished this information, which they should imho).
Also wifi 2.4GHz signals can interfere, depending on the channels used.
This is what the manufacturer of this particular chip published:
