I'm really enjoying the Arabic lessons so far, but the formatting needs a lot of work (not to mention the pronunciation). This is how the question showed up: تَنّورة____.صَديقَتهُ سامْية
I think they've fixed this now as of "16th July 2019". If you see it appear again, or notice any other bugs/issues with the course, best thing to do is report it to Duolingo directly here: https://support.duolingo.com/hc/en-us/requests/new
I just saw the same formatting error, five days later -- have often seen similar problems with other apps handling right-to-left scripts --
I am so glad that this seems to now be corrected so far on Firefox PC. These questions where showing up like that, but currently are formatted properly.