@DACZ I tried something : I rolled back the firmware on my EAP245 devices to 5.0.6 (was on the latest 5.1.0) and since then no more disconnected EAP245s :-) :-)

@TP_AW thank you for posting this. I just changed my default provider modem/router to a full Omada setup this weekend and have been breaking my head over my EAP245 's having the same disconnect...