TP-Link TL-WR902AC v3 hangs

Hello !

I have a problem with OpenWRT : I use a TP-Link TL-WR902AC v3 in client mode with a bridge to have Wifi on an ethernet NVR.

If I shutdown and restart Wi-Fi source or I reboot the router the router hangs very often.

It may be because sometimes the router doesn't connect to the best Wifi source. I have 3 sources with the same SSID. Is there a way to force a minimum signal dBm or lock to a MAC address ? BSSID seems to be identical for all sources.

I may be also because I have a lot of Wi-Fi traffic for my cameras. I only have the message "LuCI - Lua Configuration Interface" and can see the password screen and my NVR connect to the router doesn't work.

Is there a way to solve this problem ?