Ring Alarm Pro IN Bridge Mode

I recently purchased the ring alarm pro which includes eero router. I understand the "benefits" of making this the first router but for a number of reasons I will not do that. One main reason is eero router does not allow a browser to config and I have a complicated set of port forwards that I will not manage /w the app on my phone. That said, now that ring supports onvif security cameras I put my system in bridge mode as the ring alarm pro has to be on the same network as the security cameras in order to be reachable. I have 6 cameras connected via a POE switch. The issue is once I put ring pro into bridge mode 4-5 times per day the security system go into battery back up thinking the power has been disconnected and goes on cellular backup. Up to 2 min later it returns. I called support and of course was told the ring is designed to be the primary router; again noted I will not change that. However as a test to ensure bridge mode was the issue I change eero back to a router (not the primary) and the issue went away. Is there any reason why bridge mode would make the alarm system go into batter/cellular multiple times per day?