I don't think it's a duplicate of MC-197616 because we don't get spammed with "Received invalid biome id: -1". Also we did not use any custom biomes unless the CavesAndCliffsPreview creates custom biomes. I can't see anything in the logs, so I also don't think it is something like the disk i/o lag when writing logfiles as described in the comments there.
I don't think it's a duplicate of MC-197616 because we don't get spammed with "Received invalid biome id: -1". Also we did not use any custom biomes unless the CavesAndCliffsPreview creates custom biomes. I can't see anything in the logs, so I also don't think it is something like the disk i/o lag when writing logfiles as described in the comments there.