Hey had an interesting issue where my shifter popped out of the White cup cradle bit during driving and noticed the o ring at The top had a gap in it (wasn't a full circle)

But there was also no interior circlip locking ring like there was in my liberty's 5MT, is this normal?

Had to drive the car home in second gear as I couldn't shift into anything higher without it popping out :/
TL;DR is this common and what needs replacing

Cheers,