@sdetweil I suspect the module doesn’t filter out the repeated events properly and as a result it causes events not to show in the allotted space. I’ll probably just download the calendar file, edit it and put it on the local device until the published calendar is fixed. But at the end of the day, I don’t really need the MM calendar to tell me what holidays are coming up. My and my wife’s upcoming appointments are what I really need to see, so as long as those are working I don’t plan to spend a lot of time on it.
This appears to be an issue with MMM-Remote-Control, which has a “MONITOROFF” command that I was using to turn off the display. That command executes tvservice -o, which according to this documentation “destroys any framebuffers/dispmanx layers associated with the display” that are not restored when the display comes back on. On their recommendation, I switched the command to vcgencmd display_power 0and my issues have gone away.