Two of mine did this. The strip also stuck to the slide and would pull out of the track. Two problems.
First, there is a tap screw at the bottom of each strip that goes through the strip and into the coach. You have to set that screw through the rubber again. I was able to move a 1/8 to a 1/4 inch from the original hole and tap the rubber again. Use the same hole into the coach. Try not to over-tighten it or you will punch through the rubber again. Been there, done that. Once you have the strip holding at the bottom again, make sure the rest of it is in the track up the side of the coach. Definitely need a ladder.
Now if you also have the strip coming out of the track when the slide extends, use a conditioner for the rubber and it won't stick to the slide. Boeing makes a great product and I got mine from Camping World. You can also use a product made by Honda. Does the same thing and made for conditioning the rubber without degrading it. Hope this helps. Let me know if you need something else.