I noticed that too. I think it happens after doing any edit of any content or settings, not just pages. I suspect the redirection notice is causing site_messaging to break.
Issue is that no matter what I try, something is escaping the HTML when the Tempcode gets saved into the database (even after changing the field type to LONG_TRANS__COMCODE).
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#5933 - Sitewide message replication
Issue is that no matter what I try, something is escaping the HTML when the Tempcode gets saved into the database (even after changing the field type to LONG_TRANS__COMCODE).