Hey, Heather - it's nice to 'see' you again, sorry it isn't under better circumstances.

As long as you're able to get the bead back into the track, use Popsicle sticks/ or whatever else you can fill the track with to keep it there. I'm not sure that the liner is the problem - I fear that maybe the track has eroded in the deep end, please check and get back to us. If you could post some pics of the receiver before you tuck the liner back in, it might enable us to suggest a more permanent solution.