Hi, I'm trying to reproduce the bug you're obtaining but I'm failing. Could you first tell me which version of XWiki you're using specifically? Also can you show me the actual diff you obtain in the Change Request before publishing it?
In my case I'm trying to reproduce just by creating a new document and insert an AppWithinMinutes.Date object which contains a date field, and on my side removing the value in the object editor doesn't reproduce the failure. I also tried by directly removing the xobject and I don't have any error either.
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