I get this error sometimes, too. 2 - 4 times per week. But only with one of my trigger file. The difference to my other trigger files is:
1.) frequent changes of refresh rates (low refresh rate if if is unlikely that a back or lay trigger will fire soon, to save API requests)
2.) low refresh rates up to 0.5 seconds.
This week, I will try to restart MFPro each night.