Squids that are summoned (in water) with {NoAI:1b} are rotating. Giving {NoAI:1b} after spawning does not prevent squids from moving. They seem to swim into corners then.
After reloading the world they are spinning on spot instead of swimming into one direction.
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migrated
NoAI = WAI
https://bugs.mojang.com/browse/MC-67667?focusedCommentId=189630&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-189630