I got those too for some time and complained as well. Especially since all my cams were enrolled in CamPlus.
This got fixed with an app update. Every time I tried to play an event it would popover before I could view it. Annoying.
I did see that, which tells me the glitch is with those cams that are not enrolled to any plan. I also saw that rotating to landscape has an active playback button.
CamPlus Light can be free, just enter a custom amount @ $0 when subscribing. It adds 12s video events and Person Detection AI.