Character floats off of ramp when walking into a wall that is slightly sloped

Character floats off of ramp when walking into a wall that is slightly sloped. The wall angle is well above the walkable floor angle but the character seems to start walking up the wall regardless. If movement is stopped, the character will be left floating. If movement is continued, the character will fall but the cycle of walk up/fall will continue as long the character is walking down the ramp.

1. Open the attached test project
2. PIE
3. Walk up the ramp
4. Walk back down the ramp while walking into the wall (see attached video)

Results: Character floats off of ramp when walking into a wall. If movement is stopped, the character will be left floating. If movement is continued, the character will fall but the cycle of walk up/fall will continue as long the character is walking down the ramp.

Expected: For the character to smoothly walk down the wall as long as the wall slope is higher than the walkable floor angle