It didn’t seem to have a lip on the bottom wheel but I didn’t have a picture for reference
Bike back in the LBS now, they had a quick look and seem to think there’s more play in the mech than should be.
Fingers crossed they can sort it out.
Coming from 11 speed it’s always worried me how low to the ground the mech is on a 12 speed and how easy it look to catch it on something but I didn’t get a chance catch it before it self destructed.