I was reporting a bug but fixed while editing this last. But now there's another bug.

Here's a video of the original problem :

output22.mp4

the player automatically crawls when going under a diagonal tile like in the video. It does only with LittleTiles.

Oh, I just fixed it disabling crawling and enabling only toggle crawling.
Here's the new behavior (using exact mode) :

output2.mp4

I get pushed out constantly

using approx/standard mode :

output22.mp4

Problem can be workarounded by disabling crawling...

I'm using cleanroom MC here's a F3+C crash report
https://mclo.gs/APRqoay

Have a nice day !