Safari: Styles disappear before editor goes to maximize mode

[Sa'ar Zac Elias]

Using Safari (doesn't affect Chrome), going to maximize mode removes some of the styles and it's possible to see style-less page for a slight second before the editor is maximized.
It only happens after the second time or so (and it might not happen sometimes though, refreshing the page would help).

[Jakub Ś]

After consulting the ticked with @Saare it has been decided that it is irreproducible and thus will be closed as invalid.