a0159622-be29-11ee-a506-0242ac120002

That setup can be improved greatly. Remove that google AP from that cabinet. It's essentially a faraday cage, then having an electrical outlet on either side of it you are destroying your Wi-Fi signal off that particular AP.  If your other APs have a wired backbone to the main unit, you may not notice Wi-Fi issues but if the slave APs connect Wi-Fi to the master, then you will have issues when on Wi-Fi.