I have found this too, and I use pieces of the original WBBB strap suspension as tree straps. I have been using trail sticks, and they've also been hard to slide out. I think I may be overtightening the knot against the toggle, though.
I also popped the whoopie off of it last weekend while I was adjusting my uq. So now, I loop the whoopie over the toggle and knot and tie a slip hitch behind it to keep it nice and snug up against the knot.