@barnowan Yes I tried a lot of things (configuration parameters enabled / disabled, etc.) and finally I disabled the "RSSI threshold" settings on all of my WiFi devices (APs) also turned off OFDMA...

Hi Guys, we have 2 EAP615-Wall(EU) and 2 EAP620 HD(EU) AP in a small office / flat. The EAP620 HDs are working well, without any problems or failures. But the 2 EAP615-Wall devices are "doing" very...