Technical issues with Heroes III.

In SOD, it doesn't display the number of monsters in hidden locations, crypts, etc., but instead asks if you want to enter or not.

This isn't a technical issue: SOD itself doesn't display that information; you're clearly playing with the HD mod and are used to its features, not knowing what the original game interface looks like. But that's understandable: many who used to know have forgotten it; the HD mod with all its conveniences definitely reigns supreme.