Jumping from a sloped rope hang can make the player fall through that same rope hang
After jumping from a sloped rope hang, pressing nothing else during that jump will cause the player to consistently fall through that same rope hang, instead of latching onto it again. This bug does not occur with non-sloped rope hangs, and if the player moves in any direction at any point after jumping, they can latch onto the same sloped rope hang again without problems.
Gif courtesy of VAdaPEGA, who lost an Ultimate marathon run to this.