It looks like the chair(s) you’re using have a wider stance than what’s usual in these coaches. Our main (streetside living) slide goes out and drops at the end, so the slide carpet just covers the joint and overlaps the main tile and carpet area. The overlap is the only elevation difference, as Keith notes.
Only when the slide is in could there be much of a chair problem, but it’s mute because a chair still sits fully on the slide carpet as needed. The other slides sit on box frames (sofa base and galley cabinetry, bedroom wardrobe, etc.) and as I recall do not need to drop at the end.
Joel