I know this is a niche bug, but item stacks with >127 items go invisible clientside, while still being able to be picked up serverside.

Steps to reproduce:

1) Start a server, start a client

2) Somehow spawn in a stack of 127 items, then spawn in a stack of 128. Only one will be visible.

Video attached shows off the issue. Keep in mind this was achieved with modded server software to allow item merging to infinite stack sizes. I stopped after reaching 128 items.

Please do not close this issue because I reproduced it on a modded server.

Update: according to the code I work in, stack sizes are saved and transmitted as signed bytes, whereas they are during runtime stored as integers.