1.82a

I shift clicked 4 upgrade speed items into a magmatic generator(also extra utilities 2) and I shift clicked the item out, and i got the 4 back in my inventory, but 4 was still in the generator. Not visual bug, I relaunched the game several times, and both of them is still in my inv. Also i cant stack them

I cannot reproduce this issue.

Thank you for the report, I will investigate the issue.