This was introduced with #109015
The issue manifested in two ways.
* snapping did not work with rotate and scale
* the scale and rotate value would increment in steps instead of fluidly
This was caused because the snapping code would force the
mode to `SCE_SNAP_TO_INCREMENT` if the snapping
wasn't enabled for the given transform mode.
This snapping mode is not supported in the Animation Editors though,
causing the snapping `switch` to fall back to `default` which is to do no snapping.
My assumption is that this mode also causes the increments in the transform.
It would be good to support that in the future,
but for now this is just a fix to get the 3.6 behavior back.
Pull Request: https://projects.blender.org/blender/blender/pulls/112088
a41da206cd