I'm new to the forums, so please forgive me if this is a know bug, tried to search mantis but came up empty

Here the problem: I use the keyboard a lot in MM and love that almost everything can be done using it, thumbs up! But if opening propertes for several tracks (shift+enter) and tabbing down to change a field, the cursor moves through the Artist field, and if theres multiple artists this will be blank obviously.
But when the cursor leaves the field, it checks the box next to it, effectively causing MM to think I want to change the Artist on *every* track. Very dangerous if selection is big!
Also the same issue with the Album Artist field, as well as the Album field, although its even stranger here, because moving out of an empty Album field it changes the Album Artist checkbox to true!
The same with Composer and Conductor fields, so I believe this is caused by the appearance of the dropdown on these empty fields?
-D