I think this behavior is caused by me shifting the center of rotation of the axis.
I don't know why, but it doesn't show up on other similar sprites.

Managed to get this example to work with these settings.
But still I think either ide does not recalculate the coordinates of the collider correctly, or the information with the change of the axis center is not saved correctly for simulation, probably as in the problem with opacity.

Matter.js counts the physical center of shape's mass as 0;0 point, and this cannot be changed for Matter.js, causing a difference in behavior when using place and matter as the latter ignores the set rotation axis. Thus ct.js adds a field to additionally shift the texture.

Also note that debug mode for the place catmod reflects behavior of that catmod only. matter behaves differently, and it doesn't have a debug mode.

One can fix this issue by making this field compute automatically in-game. This should be trivial for rectangles and circles but will require more work for polygonal shapes. The issue with the collision mask preview in the texture editor is a separate issue, and purely a visual one. You can create a separate issue about it.