With the Luau CCL enabled, walking into a wall results in excessive bouncing (seemingly regardless of any properties set on the character and the wall. Changing elasticity / friction to min and max respectively does reduce the effect, but it is still present).
The effect is more significant at lower gravity levels. It seems to be minimal if walking into a wall head-on, and can be massively amplified at certain (difficult-to-reproduce) angles.
Repro:
Test.rbxl (68.4 KB)
CCL Active, Gravity 196.2:
CCL Active, Gravity 50:
Expected behavior
With the Legacy Humanoid system active, there is no bouncing at all:
(Legacy Humanoid, Gravity 196.2)