Created attachment 137593 [details]
Screenshot showing full suit piles that should all have auto-dropped.

SUMMARY
Simple Simon will not auto-drop

STEPS TO REPRODUCE
1. Play Simple Simon
2. gather all 13 cards of a suit into a single pile.
3. Auto-drop seen on previous versions does not occur.

OBSERVED RESULT
Full suit card pile stays in place

EXPECTED RESULT
Auto-drop 

SOFTWARE/OS VERSIONS
Linux Mint 20., Cinnamon 4.8.6, Kernel 5.4.0-71-generic.
KPatience Version 19.12.3-0ubuntu1
KDE Frameworks 5.68.0
Qt 5.12.8 (built against 5.12.8)
The xcb windowing system

ADDITIONAL INFORMATION
Quite likely the real bug is a change somewhere in the Ubuntu 20 base, but I do not have the skills to find that. 
All other games within Kpat work in exactly the same manner as in the older versions I had prior to the Mint 19.3 to 20.1 upgrade.
Kpat 19.12.3 is the latest version on offer in the distro repositories.
Bug ID 405376 is probably the same issue, as it is the same Kpat version on a distro based on ubuntu 20.04. Bugs 408582 and 411301 appear to be reporting the same issue on different or older distros.