WiFi socket - spontaneous shutdown during operation, what could be the cause?

Hello, WiFi socket is turning off by itself.
I have several WiFi sockets in my flat. They all work without any problems. The problems are only in one room. Whichever one I have there I don't switch on, it always shuts off after some time (sometimes it's a few hours, sometimes it happens every few minutes). After such a switch-off, it varies. Generally you can turn it on immediately, but there are times when you have to wait longer for it to be an option. I thought maybe the WiFi coverage was poor there. But no, checked and it's fine, the signal is good. Interestingly, the outages mostly happen in the afternoon/evening. So another hypothesis, maybe some other WiFi network is interfering. I even changed the channels on the router. It didn't do anything. When I switch on the same socket in another location it works without any problem, it does not switch off. The control of this socket is either via the app and scheduler, or via a Zigbee gateway and a dedicated switch on the wall.
I'm running out of ideas on what else to check and how to solve this. Anyone have any ideas?
AI: What is the exact model and manufacturer of these WiFi sockets you are using?
I have Emos IP-30001F and Blow WiFi sockets. They all behave in the same way.
AI: What devices are connected to this socket in the problematic room and what is their power (approximate or maximum)? Have you tried leaving the socket unloaded to see if it shuts off too?
This is always a standing lamp with one LED bulb. Load: a few watts. Yes, without load it also switches off.

Maybe it is not the fault of the sockets but of a badly configured router ???? Maybe the IP attribution is too small a time window or the inclusion of stand by in the WIFI ....

>>21791942 Then it would be the same in another location. And they work without a problem.

Plug a microwave oven into the socket (without that WI-FI switch) and set a timer in it. If the timer resets, this will indicate that there are short power interruptions at the socket. Provided you happen to have a microwave that loses its clock setting every time the power is disconnected (but I haven't seen others yet, overall).