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
laabisah and tannuurah are not female, hectorlqr, they're feminine. Grammatical gender: masculine/feminine; sex of animals: male/female. What's more, in some languages, gender of male/female entities may be unrelated to the sex, eg in German, the word for a girl is in the neuter. I'd be interested to know if this sort of thing also happens in Arabic?
Interesting. I'm new to Arabic, but I think it must have at least originally been a participle. Other languages do that. In Russian the past tense agrees with the subject in gender and number but doesn't conjugate (ie doesn't change for person). And that started out as a participle, but now is treated as a bona fide verb. It shocked me when I first learned it, to have a verb behaving like an adjective.