Marley, here is a summary that might help anyone at Ring looking at this issue.
Over the past few weeks the behavior of the ring system at my house has been consistent. Stick up cameras (battery), the doorbell 2, or chimes (basic chime not the chime pro) will switch back and forth between being connected to a chime pro with the best signal (-50s and -60s ranges) and being connected to the chime pro with the worst signal (-70s and -80s ranges). I have just 2 chime pros.
Not every device switches between chime pros. The devices that do switch between chime pros do it about every 1-3 days.
Power cycling a camera, the doorbell, or a basic chime always results in the device temporarily connecting to the chime pro with the best signal, but within a couple of days the device will switch to the chime pro with the weakest signal.
So the design feature that you described above of automatically switching connections to achieve better signals either isn’t working for me or something is overriding it.
Again, emphasizing this behavior has been consistent for a few weeks.