The new bank system messes up the min level of items all the time. This makes the whole system unreliable, since searching by min level is probably the most frequent search.
I confirmed that the problem still exists today. I dragged a Legendary Ring of Power from a Melee Items Tab to the Main Tab and back. The item then changed to have no min level instead of min level 28, making it show up in a level range search of levels 1-3 and not show up for a search of levels 28-30.
The problem seems to be in the drag and drop code and it seems to be assigning the Augment level to the item (0 if there is no augment slotted).
Without reliable min level searches, the "new" bank is much less useful for me than the old grid bank, because there, I could organize items by min level and reliably find them.
While you are at it, can you please fix the long standing issue with augments in the shared bank system displaying the wrong bonuses.