I flew this asymmetric tailed flatplate delta and it has an obvious flight behavior - can you guess what it is?

Rolls great to the right but if try roll to left it death spirals. Too much drag to the left I guess.

Back from China now and no access to cheap EPP foam so resorting to Dollar Tree foam. Don't know AUW. About 20" WS. 1800kv motor with 7x5 prop and 1000mah lipo. Flies ok , nice roll to right but not to left because am using paperclip control rods and they give sloppy control. Going to get little bike spokes and beef them up but not bad for an hour of work, at least am flying.
Fin is asymmetric but seems ok, dont think it affects weird roll to left but will find out when I replace rods.