Thanks for the report. This can happen if the framerate is low - the climbing system times out before reaching the top of the ledge. We're working on a fix. In the meantime, have you tried running the game at something lower than 1080p, or switching to low quality in the pause menu?
i have, and it hasn't seemed to help much at all. though in all fairness my computer is fairly old so this sort of things unfortunately happens a lot.