steps to reproduce :
back up a world. THere is a 98% chance it will be fine, so do it hundreds of times. Make sure you do not change the version of the game. continue to check every world and eventually there are corruption lines.
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Thank you for your report!
However, we are already tracking this issue, and this report is a Duplicate of MC-151823.
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check the biome on the image, see if it makes sense