Let's say among you files you have a one that in ARTIST field has something like
Some Band A feat. Some Vocalist B & Guitarist C & Turtablist D
And now, if you select all of the files and go to Tag Panel to the mandatory ARTIST tag field, you can select the triangle icon to open the drop down list. And on that list that data will show up correctly as
Some Band A feat. Some Vocalist B & Guitarist C & Turtablist D
But if your Tag Panel is not wide enough, then you do not see the whole text- and thus might want to hover over it just to see all of it. And then what do you see in the pop up [comment] window?
Some Band A feat. Some Vocalist B Guitarist C Turtablist D
There are simply no ampersands being displayed