@MJoksimovic 

This is switch and gateway settings, 

do you have information about 

switch type and firmware

router type and firmware

and controller type and firmware version?

In general 

IGMP is set on interface config

IGMP proxy is set on services and IPTV

  @MR.S 

The network infrastructure is given below:

[Internet] -> [Router] -> [Optical Switch] -> [Switch] -> [Access Point]

[Controller        ]: OC300 v1.0, Firmware 5.12.9, Firmware 1.19.3 Build 20230906 Rel.38429

[             Router]: ER7206                  , Hadware version  1.0, Firmware version 1.2.3   (update-able up to 1.3.0)

[Optical Switch]: TL-SX3016F          , Hardware version 1.0, Firmware version 1.0.1   (update-able up to 1.20.1)

[             Switch]: TL-SG3452XP       , Hardware version 1.0, Firmware version 1.0.6  (update-able up to 1.0.7)

[   Access Point]: EAP235-Wall(EU), Hardware version 1.0, Firmware version 3.1.0  (update-able up to 3.1.1)

Thanks in advance

  @MJoksimovic I have a similar issue.
 

It appears the IGMP proxy doesn't work on Omada ER7206 if using a PPPOE interface for WAN connection. If I swap to using my ISP provided router between my ONT and ER7206 then swap to a static IP on the WAN of the 7206 everything works. 

I think this is a similar issue to what Ubiquiti were seeing where you need a secondary IP set on the WAN interface so as t receive the packets for the IGMP and the proxy to work properly as they don't come over the PPPoE service.