Gamebreaking bug

[Parthurax]

Minecraft Version: 1.12.2
**Inventory Tweaks Version:**newest.

After a while on a Server my Inventory begins to freak out.

Open close, duplicate items, switch items. items dissapear ( they never realy dissapear or duplicate as soon i open a chest or something everything goes back to normal but if i start to drag something it starts again))

As soon the bug start i cant play anymore. that happend on 2 diffrent Modpacks and 3 times server reinstall.

this happens only to me so far...

removing Inventroy tweks solve the problem and i can play.

English isnt my mother language but i hope you understand me.