tomkatb - I am currently having the EXACT same problem. Orvan, and I can't see him until July 2021, told me to push it out at the top. So, we now carry a large push broom, and wife hits slide out button, I push hard on the slide top until it gets past the stuck point....and then the slide comes out fine. It comes in fine.
Be very careful, as if you let it get to unbalance you can do some damage to your bed pedistal....how do I know.
The factory has been NO help as far as paying for a faulty product. Orvan told me they are going back to the old style - toppers with no metal caps. He also has been replacing other CC units that have had the same problem. Ours is a 2019.
Good Luck - and push hard.
2019 Cedar Creek 34RL2 w/disc brakes
2017 GMC 3500 D/A, DRW, 40Gal Aux Tank
Retired Dept of Navy: Navy/USMC Flt Test Engineer