Appears to be largely/entirely issues with background positioning, possibly caused by the sheer quantity of background styles applied to some of the elements, or maybe we just don't have the ability to flip things like that anyway.
Be easier to list the ones that DO work rather than not:
- p-personal underline
- the absolutely-positioned vertical ones on the far side of the content
Nope, that appears to be it.
Note that all rtl images used in ltr do appear to be correctly flipped to their ltr counterparts in rtl, so no issues there aside from the sheer quantity being a bit silly (T213342).