Solve the issue with turning off WIFI?

Question

Computer networks

Good afternoon.
There was a problem in the office - WIFI falls off.
The laptop from WIFI does not turn off, but the Internet disappears.
I installed several identical routers, connected a laptop to them and I see just in a few hours it jumps from one grid to another.
The Internet on the router after a while appears itself.
If you connect via cable, then everything works fine.
Tell me which way to dig.
Thanks
To warn some questions - on a Win10x64 laptop, I updated the drivers for WIFI, the router was reflashed.

Answer 1

It looks like a buffer overflow in the router. This can happen due to problems with the NVRAM of the router, due to a small network storm, but then it would not only be stupid. Because of the firmware, maybe, but it has already disappeared. It also happens due to a faulty wifi or ethernet controller.
In any case, I recommend taking it home and connecting it there. Check. There will be a problem or not. If not, then most likely the problem is with one of the controllers. If so, then most likely with NVRAM. But this is if you even need to understand the reason. If not, then don't care - just change it.
After all, as far as I understand, the problem is only with this router? Do the others work?