Steps to Reproduce:
-Go to https://en.m.wikipedia.org/wiki/Main_Page with Safari for iOS 14.0.1
-Make sure you are logged in
-Click the human icon in the upper right-hand corner to drop down the menu, then select 'watchlist' to go to the user's watchlist.
-Next to the title of any recently edited article, it says: "(diff | hist)". Click 'diff'.
Actual Results:
I am taken to the front page of the article.
Expected Results:
I am taken to the "difference between revisions" for the most recent revision of the article.
For some reason, the 'diff' selection on the watchlist page no longer works. I am able to see the differences if I go to history, then select 'compare selected revisions'. The 'hist' button on the watchlist still works. Only the diff button from the watchlist is is no longer functioning as it used to.



