Constrain inside graph causes characters to get stuck on slopes

For some reason when constrain inside graph is enabled, characters sometimes get stuck when entering the slope.
Even if they don’t get stuck, they stumble (velocity drops).

Initially, I thought it was caused by max step height/collision testing offset.

Setting max step height to 0 and collision testing offset to an abnormally large value (like 2m) fixes it. But this connects a lot of places together that are not supposed to be connected. And makes tunnels not traversable

In the screenshots characters try to get to the top of the ramp (difference between the 2 - local avoidance being enabled/disabled)

I am using 4.3.79 Beta

Some help here, please =)