Thanks, I don't readily see a cause, but by inference suspect these 2 Apps...
https://sonosim.com/performance-tracker/
https://examsoft.com/exam-software-products/examplify-from-examsoft
Since they profess to "control" internet connections.
Safe Boot from the HD, (holding Shift key down at bootup), does the problem occur in Safe Mode?
To find out if it's system wide or user specific, try this...
Open System Preferences>Users & Groups, unlock the lock, click on the little plus icon, make a new admin account, log out & into the new account.
Does it work in the new account?