Well, I can only say this situation is not common or in my experience with my 7 cams, so we should look towards the possibility of a malfunction.
I will post a link to a user that posted a manufacturing defect just 7 hours ago that could affect your cameras, depending on the extent of this defect.
One thing I would do for sure is contact Wyze support on the affected cameras. They have tools that can prove there is plenty of signal strength at your cams and determine whether the cam should be replaced.