If the default editor has still somewhere not-intended left-right/right-left behaviours, please report them in the
issue tracker of DokuWiki. Last DokuWiki release got a lot of rtl misalignments fixed in media manager. To discover them, it is very helpful to get response from native rtl users :)
(tip: Please add screenshots (and the steps to perform) to explain the cases in the issue tracker. That makes it a lot easier to understand the misalignment.)