No. It's not isolated. It's broke. Do a search here on the forum for the fix if so inclined. The revert works for this particular app, but breaks on update again of course.
To kill the hanging process, just use xkill from the terminal, or, ps aux |grep whatever, kill -9 process number. You can also run top and kill the process from there if you so choose. If you want to make it even easier, you can set up a taskbar xkill by adding "force quit" to your applications on the taskbar. Right click, add app, force quit... that is xkill. Click on it, it will change your mouse curser to an app killer, click on the hung window... POOF... gone.
Recommendation long term however is to use the promt to kill processes. You can verify the process manually and kill it. That is the better way to do it. There are very few times you will ever truly "need" to reboot linux. A kernel upgrade being one exception.
"LMDE - Linux Mint Debian Edition - Debian, with a touch of elegance." -rjs