[brazen1]

"Quit" meaning exit the external player whether by remote keymap, mouse on red X, or ALT-F4.  Doesn't matter.  All the methods close the player(s) successfully as they should and always have but result in KODI v.18 malfunction described previously.  Sounds like the issue you are fixing is unrelated to what I've described and experience but I'll try it again anyway just to leave no room for doubt.  If KODI can't function after watching a 3D movie without forcefully killing it and restarting it again, its graceful shutdown will never occur and it needs a graceful shutdown or more problems will arise.  I understand no one is interested in 3D frame packed iso anymore and have abandoned them but I haven't.  I assume even with a ticket on the issue, no one can replicate it since they don't have the equipment and can't get the equipment even if they wanted to in order to replicate/diagnose.  Will probably end up stuck with 17.6 which is better than nothing.  Bums me out...

Your contributions don't go unnoticed or unappreciated though.  Beneficial for those with narrow or no 3D interests but keeping external player usage alive and well in all other aspects.  Thank you again.