video: https://youtu.be/UgdhGW_JmFM
Forge version - 1.16.5 - 36.2.0
Create version - mc1.16.5_v0.3.2d

1. Place a Adjustable crate
2. Take 2 identical unstackable items
3. Put first item into second slot
4. Set limit items in crate to 64.
5. With cursor take a second item and click left/right button mouse on first item.
   Items stacked.If doesn't stack at first try, try again.

This issue has been marked as stale because it has been inactive for 3 weeks. It will be closed if it remains inactive for another 3 weeks.

This issue has been closed since it has been inactive for 3 weeks since it was marked as stale.