[closed] Something Happens When I Open My Bank..

So, whenever I open my bank, I get a message saying:
"There wasn't room in your inventory, so items were dropped."
I've done nothing - I haven't even touched my inventory (and I didn't accidentally misclick the Emerald Merchant). Nothing is on the ground, and nothing is gone from my inventory (so that's not the issue [also nothing's gone in my bank]).
I'm playing in 1.9, so that might be an.. issue (look, I'm doing it because I don't want my textures to get mixed up)..

Um, yeah. Just wondering if anyone would know why this is happening to me and how I could fix it (probably relogging would fix it).

Spoiler: Pictures

 

This message appears when you use your bank with a full inventory regardless of if you dropped an item or not.

 

Ah ok (when did this happen?). Thanks!