List of steps to reproduce (step by step, including full links if applicable):
- Go to an old version of a page (e.g. https://test.m.wikipedia.org/w/index.php?title=MobileSourceBrokenTest2021&oldid=490544)
- Click the edit pencil icon. (If Visual Editor loads, switch the source editor)
What happens?:
- The editor loads in read-only mode (Viewing Source of ....)
What should have happened instead?:
- The editor should allow editing and publishing.
Reported on enwiki at https://en.wikipedia.org/wiki/Wikipedia:Village_pump_(technical)#Editng_an_older_version_of_an_article_not_possible_on_mobile%3F