When a page has an image on the first line and the image caption contains a <center> tag or a <div align="..."> tag (where ... is "left", "right" or "center">, the right half of the VE toolbar (Beta, Page settings, Cancel and Save) are not visible. Obviously this means you cannot save any edits.

Curiously, <p align="center"> does not exhibit this problem.

Example from an article: https://en.wikipedia.org/w/index.php?title=Little_Tich&oldid=573770305

Minimal test case: https://en.wikipedia.org/w/index.php?title=User:Thryduulf/sandbox4&oldid=573786703

Version: unspecified
Severity: normal
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=54642