I have been using Omada for many years and have now changed the switch and access point. My Omada setup before switch and access point upgrade was:

OC200 v1
T1600G-28PS v3

EAP620 HD(EU) v3

Now i'am using:

OC200 v1 - Firmware 1.31.1

SG3218XP-M2 v1 - Firmware 1.0.3

EAP772(EU) v1 - Firmware 1.0.13

I noticed that the EAP772 is quite picky about the LAN cable. With the same LAN cable (CAT6a S-FTP/PIMF) which was used with the EAP620 HD, the EAP772 aren't able to run with 2,5 GBit/s und falled back to 1 GBit/s. Then i have fixed the Switch-Port for the EAP772 to 2,5 GBit/s and the LAN-LED on Switch is blinking green, then off, green, off ect.

Then i have take another LAN cable and the EAP772 is working fine. Last week i get two high quality LAN cables (CAT7 S-FTP/PIMF), With LAN cable 1 the EAP772 runs fine, with the other cable not. With this reasons i'am a little bit confused about this behavior. I don't think it's an hardware failure, because the EAP772 runs with the "correct" LAN cable very great. Maybe this is a firmware related issue?