Wi-Fi disconnects by itself IIC800

hi friends
I have a small problem after 3 or 4 hours the Wi-Fi disconnects, I have to go back to the device, press any key and it reconnects. any ideas? thank you

Please make sure that the router does not have a limit on the number of connected devices.
Please put the device next to the router for testing, can it stay connected? This can help us check whether it is caused by unstable WIFI signal.