To maybe elaborate a bit further:
The ground is “kinematic” because I wanted to implement something like pits the hero can fall into and die.
My game is very close to the runner example. The example does the ground with a “static” collision type (Endless runner tutorial), which does not have the problem described in Directional platforms help, but I wasn’t able to implement pits with “static”.
Now with the ground changed to “kinematic”, I run into the aforementioned “directional platforms help” problem, which I’m trying to fix with Platypus…