First thing's first, is this really a bug?
While upgrading today, i decided to use the mass select button because i had way too many common powerkits that i didn't know what to do with. (ofc, i didn't actually do the upgrade since that would be a real waste).
Anyways, i had about 60 common powerkits plus some rare ones and i chose a lvl 1 legendary to upgrade. When I clicked mass select, instead of going down the list selecting the powerkits, it skipped around.... and the same skipping pattern appeared no matter what item i used to upgrade.
Here's a picture:
So the question is just.... Why??