System tray notification badge appears as a rectangular outline

A couple of days ago I noticed that the System tray notification icon on the right side of the date/time is broken.

Whether I have or not any notification, it will show a rectangular outline, not the usual round badge with the number of notifications, and if I turn on the do not disturb, then it will show the proper icon, also, if I click it, it works as expected, it's just showing the wrong icon. Here's a shot

I haven't made any major changes and I don't know what to do to troubleshoot this, any inputs?