I just found this "community" after searching for a better way to get support, since Arlo seems to be totally useless.
I have a 3a XL and have had the same annoying issue starting about the same time.
I had posted this in another area of the forum and an Arlo support person said it was being escalated to the development team. We'll see what happens but I won't hold my breath.
I notice that Google app updates sometimes take time to make their way to my notifications. I manually checked on this app and found an update.
After updating it just now it DOES appear that the problem is resolved.