@Xa13 

Are you running an ER605v1?  If so, it looks like the memory crash I'm chasing with support.  To get around this, create a weekly reboot cycle for your router, this will prevent things gettting critical.

  @Xa13 
 

Even though it may be upsetting to learn that your network has gone down, it does happen occasionally. Fortunately, you were able to get into your device and reboot it to get everything back to normal.

Regarding your EAP subnet change notifications, this might either be a false alarm or mean your system experienced a brief issue - especially since rebooting may have helped it fix itself.

Without further information, it can be difficult to determine the specific cause; nevertheless, network device outages occasionally occur, so perhaps this was an isolated incidence and everything will continue to function normally going forward.

Please feel free to ask further questions if you have any concerns.
 

  @Xa13 

Without knowing exactly how the 3rd party router is configured, I can't be sure, but I suspect it may be at least partly to blame.  Do you know if it NAT's your two WAN options?  It would be important to isolate your LAN IPs, particularly those of the APs and Controller from changes in the WAN link.  Are you meshing any of your APs?  Is there a chance there are power glitches...these would cause APs to reboot, and they could come back up on their default subnet which is probably different from what your 3rd party router is handing out.

If it was me, I'd look long and hard at how the router is behaving, and it might be easier to just add a $50 ER605v2 into your mix to complete the Omada managed solution, this would guarantee isolation of your APs from whatever the LTE or Starlink connections are doing and any WAN down decisions would be made by an Omada node.

FWIW I had Starlink service for a few months and it worked really well with the TPlink solution (605 + 225's), though I removed the starlink supplied router and just directly connected to the dish (I had the round dish with separate POE and router/wifi boxes...I understand it's a little harder to remove the Starlink router with the newer pizza box dishes).