At the end of season 2 of Agents of SHIELD, Jemma gets taken to a different planet by the black monolith. In episode 2 of season 3, the SHIELD team arrive at an ancient British chamber which was designed to control the monolith. They later figure out Daisy can keep the portal open. When she does, Fitz jumps into the portal and catches up with Jemma. But then Monolith bursts and both Fitz and Simmions are back.
How is this possible? I would assume that if the portal broke, then both of them should get stranded on Maveth. How did they magically return?
PS: No need to worry about spoilers. I've watched all episodes (as well as all MCU movies) and rewatching Agents of SHIELD.