I just "fixed" them. I pulled them out to max, put slight deflection maybe 5-10 degrees while turning at same time. After a few tries, they actually started to grab and tighten up. I set them to the length I wanted, tightened, and them electrical taped them in place. Just didn't want to take chance if them not tightening up again. If this didn't work, yeah, call was in works. I have called them before on their deathgrip and were helpful. So no clue why they wouldn't tighten up. Not sure what I did had anything to do why they started working again either. But all good to go now. I use them primarily for xbow on ground.
Wished these were made with cam locks.