White Square icon in status bar

[TM2]

Hi, how do I get rid of the annoying white square notification icon in status bar. I have standard S8 phone, no change applied on OS, not rooted. And I cant get rid of it else than disabling notifications in status bar a then I dont have any notifications...

[BandOfBrothers]

The first thing I'd try is to put the phone in Safe Mode which disables any downloaded apps and leaves the stock ones working.

If it then disappears then it's a downloaded app that's putting it there @TM2 

It would be a case of then finding which downloaded app it is !