I accidently upgraded to 78.4.0 and it has been working fine except I'm losing tasks (not events) in calendar. It appears that tasks with a due date prior to today simply disappear. For example, last night I had 21 tasks with a due date of 12/14 or prior. I believe they were all 12/14 but can't be positive. All 21 showed in the task reminder window and showed green in the task list. I closed out TB by "x" ing out of the window. Later last night, I opened TB again and then it showed 4 tasks in the task reminder window and they were green in the task list. The other 17 are gone. All 4 had a due date of 12/14. I shut down TB and this morning when I fired it up, those 4 are gone. Has anyone else had this problem? Is there a setting somewhere that might be causing this? Any help would be appreciated.

I'm running windows 10 Pro.