Page content disappears after update 5.4.1.1

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Hit an odd bug where one page on our site lost all its content after update 5.4.1.1. This includes previous versions, although the previous versions are still listed. Any idea why this is the case?

Stiny
 
Stiny replied on at Permalink Reply
Stiny
Okay, the problem has now generated to something that really *is* pressing. haha

Whenever I try to delete the page, it says "Unable to load sitemap data". I made a test page, and it deleted just fine. Any ideas?