[Bug] Shift clicking in the wizard trade menu is bugged

[RulerOfEternity]

Is there an existing issue for this?

• I have searched the existing issues

Observed behaviour

When you shift click the items you want to receive from the wizard into your inventory, they remain there, when you exit the trade GUI you still get them, but it's bugged where it looks like it's stuck in the GUI until you leave it, video:
https://youtu.be/IYYqoP7czXk

EDIT (UPDATE): It seems to be an issue only in that specific trade I mentioned where the spell book is being demanded for something else, EVERY OTHER TRADE IS FINE.

Expected behaviour

Shift clicking items like in the villager trading menu as you can see in the video

Steps to reproduce

Trade with wizard, give it whatever it wants, shift click the item you're supposed to get in return, it's stuck in the GUI until you leave, then you do get it.

Crashlog

No response

Environment (Singleplayer/Server, etc.)

Singleplayer

Mod version

4.3.11

Minecraft version

1.12.2

Forge version

1.12.2 - 14.23.5.2860

Other mods

No response

[RulerOfEternity]

UPDATE: It seems to be an issue only in that specific trade I mentioned where the spell book is being demanded for something else, EVERY OTHER TRADE IS FINE.

[RulerOfEternity]

Apparently I asked around and seems like it's a problem in every trade for some people, Moreira reported having all their books turn into Magic Missile when shift clicking once, but they couldn't reproduce the bug and their game crashed soon after it happened.