Ring Floodlight Cam won’t connect to WiFi after changing to mesh router

Hi there, I have a wired flightlight ring cam for around 1 year. And recently I upgraded my router system by a TP-LINK WIFI 6 Mesh systems, so it provide strong wifi signals for the whole house. Then I tried to re-setup all 7 ring devices and only this floodlight cam failed again and again. We tried to reset, delete it and resetup. Nothing went through. I am so frustrated. It always returned me an error that "camera is too far from the wifi" but this is not true. I did some search and found some people mentioned flood light cam has some bugs with mesh router, is it the case? How could I resolve this issue? Thanks!