I edit Wikipedia with Safari on iOS 7 on an iPad mini, in landscape.
I get the Visual Editor. It appears nicely !
I am typing some words in the middle of an article. This makes the content scroll erratically vertically. Typing still works, but very soon I do not see any more where I am typing. This bug also occurs when I press Backspace to erase some letters.
It would be nice to fix that.
[Edit] Clicking on the content also makes crazy vertical scrolls. Especially clicking on a template call or its button Modifier. Trying to repro the scenario of T120573 triggers crazy scrolls repeatedly.