State tax filing

I'm  a nonresident alien arriving here 9/2020 on an F-1 Visa, renting in Maryland.  For 2020, I qualify as a nonresident in Maryland under the 183 day rule and I'm leaving the country in May 2021, so I'll also be a nonresident for Maryland in 2021 too.  My only source of income is wages earned in DC working at a DC employer.  Are these wages from "Maryland sources" that I have to report on the Maryland Form 505?  If yes, is it because of the reciprocity between MD & DC?  Or can I exclude the wages and not file in Maryland at all?