After updating my 1.17.40 world, random pillars of water and lava are appearing in previously loaded areas. I assume this is due to some terrain regeneration and height adjustment. What was even more strange is that I went through an area where there were no pillars and slept for the night. I then went back the same way and there were new pillars of water.
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We're tracking this issue in MCPE-144937, so this ticket is being resolved and linked as a duplicate.
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