Macrium scheduled backup tasks start hours late or not at all

I have Macrium Reflect 7.2 (free) running on Windows 10 version 20H2. I have two scheduled tasks: a monthly full backup at 1:00 a.m. on the 2nd Thursday of the month, and a weekly differential at 1:00 a.m. every Sunday. They were working reliably and on time until six months ago. After that, they have almost never started at their scheduled time (it's possible that the only times they did, I was up late still using my computer). Occasionally they even run on an entirely different day, or fail, or sometimes just skip altogether. Attached is the log file listing with each date opened so you can see the times. As you can see, the problem started 12/13/2020. Frequently I am actively using my computer (and have been for hours) when the notice pops up saying the backup is about to run.

I have also attached a screenshot of my schedule, showing the settings for the differential backup. As you can see, I do allow Macrium to wake up the computer, which is powered on 24/7 and plugged into AC. As far as I can remember I have not changed settings. I don't remember if an update to either Macrium or Windows coincided with the change in behavior, but I know it wasn't 20H2, because that update was recent. Any thoughts?

@OsakaWebbie First thing I'd be doing is updating Macrium Reflect to the latest free version 7 which is 7.3.5925. You are way behind. Lots of fixes have been done to the scheduling. See if that fixes your problem.

Okay, I did that (and allowed it to convert to the new Macrium Task Scheduler). I'll report back on Thursday or next Sunday how it performed.

Both Thursday and Sunday backups ran right on time, so the new Macrium scheduler seems to have solved the problem. Thanks!