I don’t have Cam V4 so I don’t know if it has this same issue or which firmware introduced this new behaviour.
For Cam V3, you’ll need to revert back to firmware 4.36.11.8391 as it will not automatically restart after 30 minutes of internet outage. At one point previous beta FW actually fixed this problem, but the latest beta (4.36.14.2589) that was released last week reverted back this change.
Since that post, there have been several Cam OG beta FW updates so I don’t know if they finally addressed this behaviour.