numerous different settings have been tried with no smooth experience.
this is with perch radius same as capsule radius:
still saw-ish sliding if at all.
the only thing i have not noticed before is, that this jagging sliding happens to the left side more often than on the right side (if that makes sense).
also this: Issue with Can Walk Off Ledges false doesn't work right on his second post seems to be also my case.
thanks for your time!
pinch_AT