I upgraded my Discourse instance recently to the latest code, and have noticed that I can now zoom in mobile Safari. I also upgraded to iOS10, so it may relate to an iOS change and not a Discourse change.
This wouldn’t be a problem in itself, but I’m finding that Discourse is now regularly showing a subtly wrong zoom level, which truncates content on the right-hand side of the UI. Very problematic. Not all users will know to zoom out again.
This wrong zoom problem occurs when opening a compose window and then persists until I zoom manually back out again:
It’s affecting meta.discourse.org too.