It's also annoying that while the toolbar (normal or advanced) loads I can't type in the header (for section=new) or the edit area, at least on Firefox:* is this the same problem? (*) Might also be a recent regression: https://bugzilla.mozilla.org/show_bug.cgi?id=795232
Maybe... It's also anyway annoying that the toolbar jumps down some moments after loading the page...
If WikiEditor wasn't implemented in _pure_ JS, the panel would be generated by php so this problem wouldn't exist...