Encountered issue first on a modded server running 1.15.2 forge 31.2.0 ; Tested with Singleplayer, both 31.2.0 and 31.2.31

Discovered a cave where slimes were spawning, so I made a slime in a bucket to find the correct chunk to make a farm, but it didn't jump around to indicate a slime chunk anywhere within the cave. I then went to the surface to walk around to find a slime chunk with the bucket, and eventually discovered a chunk that caused the slime in a bucket to jump around. I then discovered that the slime was indicating that every single chunk in a line along the Z axis was apparently a slime chunk. I believe this is a false reading.

I went on to test this bug in singleplayer to ensure that it wasn't just a mod conflict. It was still occurring in a newly generated world with just Quark-r2.1-245 and AutoRegLib-1.5-40 installed. I was unable to find any other indicated Slime chunks in these worlds.
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Seems to be a dupe of #1998.