Unity still running after exiting

I log in into hub, go to my project, work on it for a bit then exit the editor and terminate the hub (using

ctrl+\

because

ctrl+c

doesnt work for me in latest version) and then check the process list with

sudo ps aux | grep -i unity

and see that my unity editor is still running! -

/home/main/Unity/Hub/Editor/2019.2.0f1/Editor/Data/Tools/Roslyn/VBCSCompiler -pipename:main.F.ptS7OQ3_6g

. I can of course kill -9 the process but why does it still run when I exit and how could I fix it? Any help is highly appreciated!

EDIT: oopsie, I am failing to replicate the issue, that's weird