I don't know how else to describe it beyond what I've already done. Are you sure you are seeing all the comments? Have you tested with a post? I don't use the app fwiw. Only tested with the mobile website and it has been like this for years.

I still use old.reddit.com on the phone. Works fine with pinch and zoom. Super performant too, loads in a fraction of the time which is necessary with mobile connections and spotty coverage. I just saw the native reddit app for ios at least is like 450mb. WTF...