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I run 27b3 on my iPad and it has worked great for my use cases.

My dad was having some indexing issues on 26, so I tried to upgrade him to 27, but it was even worse for his workflow. It broke Handoff's Universal Clipboard, which he uses every few minutes, and CarPlay, which he uses many times a day. So we restored back to 26 yesterday evening and all is well again.
 
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