This is a 3 year old thread, so it is a bummer to know this can still happen. I only had it happen once to me many years ago, but since then I just added “Check Wyze cam subscription status and firmware” to my monthly task list. I often look at Wyze’s announcements and updates around that time so I can keep up with changes, since I rely on Wyze as a part of my security it’s worth keeping up with and I could never expect it to be “set and forget” since it updates, changes, etc.
Edited to add: I have had my cameras sometimes miss motion events, so I use Continuous SD recordings in all my non-battery models. I highly recommend it if you haven’t tried it recently… I had some trouble with the SD card 24x7 recording crashing V3 cams on earlier firmware, but that was resolved a long time ago and no issues so far with V4.