The BiDi editing tool does not work with this. That's going to be a problem with a lot of RTL language wikis, where jumping back and forth to check template syntax is common.
Topic on 2017 wikitext editor/Feedback
Steven, I think I'm going to need a lot more information about this. Please have a look at phab:T153378 and phab:T153356 and tell me if those are the errors that you're encountering, or if it's something else.
It could be also just an unability of gadgets to work with new editor.
Will respond in the am US EST.