[GNC] Auto-save failure

[Dale Alspach]

I recently had an unpleasant surprise. I rarely restart my computer so
gnucash is open for several weeks at a time. For over three weeks gnucash
had not saved the main file. Fortunately playing the log file did a pretty
good job of recovering.
My question is what would suddenly stop the auto-save feature from working?
Could updating some other package have caused this?
 Environment: linux mint 20, flatpak gnucash 4.9.
Dale