"Undo" loses data

Either I've had a massive brain freeze (entirely possible), or I've found a serious bug in 2.7.  Whole blocks of cues are disappearing. It seems to be related to "Undo".

The first time it happened, I  assumed it was PEBKAC, but it happened 3 or 4 more times. I know the cues were written, because I was able to restore them  from previously-saved show files.  I don't know if other data are erased.

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  • This happened to me twice today too. It changed the patch as well, reversing patch changes made earlier in the day. Not exactly sure, but in my case it seemed to roll back to a state about 3 saves previous. I'll try to get console logs to tech service.
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