We are only printing high temp on the left as its recommended by Bambu due to brittle filament and the left has a bigger tube bend radius. Our prints are functional so there generally only one color. The right nozzle is not used but still has low temp filament in it(not loaded but left over). This is what we think is causing the issue.
I just did a high temp print with the left nozzle and switched both nozzles. Right nozzle was empty and i did a cold pull on it. After the.print both nozzles removed easy.