Act 3 stash bug at the first camp

When you first get to Act 3, you can't store your items into the stash with Y. It only lets you drop your items when you have the stash open. The only way to put your items in the stash is to drag them over manually.

Edit: After you get past the first camp, the Ziggurat Encampment stash works perfectly.

This bug also happens in all trials on the last stash box.