crash-2019-12-05_21.35.49-server.txt

On a server with 1.12.2 and 139 mods
The conflict is between this mod (Mekanism) and OMPD (Open Modular Passive Defense)
It appears to happen on chunk load, though because it is a check for creature spawn I am not 100% sure.
It doesn't matter what Dimension the players base is in, because they have moved it multiple times, and this error keeps appearing randomly.
I have submitted this bug to the OMPD github as well, which I will link here.

This is a Sponge bug (I have only ever seen it when Sponge is involved) - there should be a 1:1 relationship between the block at a position and the tile entity at that position.

In cases such as this that relationship is broken. This has also been reported before; please follow the issue template when reporting issues, which includes searching prior issues

I had searched for this issue before, and I found this issue from 3 years ago, which also involves a cast to a Mek multiblock in the CreatureSpawning. It was fixed then, but since it seems to have resurfaced I figured I would make a new post.

The most recent repost of the issue was #5685