When the width is insufficient, the Read/Edit tabs tend to overlap with the Page/Talk tabs. It would be better to hide the "Read" fake tab, before Edit is collapsed into "More".
|Open||None||T311254 On mobile header icons overlap with search bar in responsive mode|
|Open||None||T106463 [EPIC] Ready responsive Vector for wider deployment|
|Resolved||Jdlrobson||T119871 Remove the "Read" tab in Vector's responsive design|
That might work. I only care about the "edit" button not being hidden, everything else is not so important. (If navigating away from action=edit requires usage of the "back" button or equivalent, that's hardly a tragedy either.)
I am testing the hiding of the active tab myself: https://en.wikipedia.org/w/index.php?title=User%3ATheDJ%2Fvector.css&type=revision&diff=735839405&oldid=703323026
It's an interesting idea.
Where Vector is enabled as responsive
the tabs appear like so without an overlap:
While clearly this UI can be improved the original bug report no longer seems to be a problem.