Minecraft Username: KMaxwell

Brief Description: Stackable items in a backpack will not stack with new items if in your backpack while you log out.

Instructions:
1. Put something stackable in your backpack (ore, dirt, glowstone dust, etc)
2. Log out
3. Log back in and try to put new pieces of these items in to the existing part stack in your backpack

How many times did you recreate this bug?: 2-3 times

Result: Items will not stack

Expected Result: Items should stack properly

Evidence: None, am unable to video the issue, and screenshots don't really help.

 

I also tried giving the item, in this case coal ore, to another user (@vwman67) by throwing it to them and it would not stack in their inventory.

We were able to re-stack the items by using the /stack command, but not everyone has access to that.

 

I just duplicated the bug again in order to try this, and no, there is no change to the item ID # according to /itemdb, both are the same.