Schedules copies have intermittent problem

[Estuary]

I've had a similar problem for awhile (I'd say 6 months or more): Every so often (now perhaps once every two weeks, on average), a scheduled copy won't run. There won't be an error message, so there's no log recording this, but if I open SD, I'll sometimes see that the "last copy" wasn't yesterday (I have it run every day around 3:30 AM). An additional problem is that once it doesn't run, it doesn't resume running the next day, and with no error message, it might be a week or more before I see it hasn't been backing up. I've taken to looking every day, but it shouldn't have to be this way. I cure the problem by selecting "Copy Now"; once it copies in this manual way, it will resume running on schedule (until the next time it stops copying). I had hoped the latest update would solve the problem, but unfortunately it hasn't.