Instead of the Task Manager>Processes page, I resolved by by finding and force closing the game from Task Manager > Details (find Gw2-64.exe and End Task).The process does not appear in the Task Manager > Processes page; closing gw2 processes from there don't seem to completely terminate the game.
https://imgur.com/a/bMIEpQI
I'm consistently able to repro the issue when exiting the game, I think the recent patch may have introduced a bug in the games exit process and it is leaving some orphaned process. If using gw2launchbuddy that needs to close and reopen the game I also consistently get this. So to use gw2launchbuddy, open the taskmanager > details, and keep closing the process after update completes till it launches successfully (otherwise it'll hang waiting)