In RH2020 Update 5 it is possible to create folder names with dots (V2021.2) e. g.
Robohelp interprets all objects with dot as file even if we create a folder.
That is certainly a bug. Either you are not allowed to use dots in folder names or the folder with dots is also interpreted as a folder, right?
If a folder is created on the disk (in Windows) but you see a file in RH, then I think that would be a bug (which I think is what your first image is showing?)
You can request features and report issues here: https://tracker.adobe.com/
Post the item number in the discussion so people can easily vote if they want the same functionality.
Whether the bug is that it isn't a folder in RH, or that you can create it with a dot, I'm not sure. 🙂
Did you test it with Update 6 yet?
Yes we did today. Same behaviour....