This is not really true, unless you mean the word ‘should’ to indicate that it should happen this way if there were no bugs.
This thread reported on a systematic bug in Treeshare in which links to all HMTL files are lost, and the links are not fixed by the ‘fix broken links’ tool. I am not aware that the bug has yet been fixed. The bug is that text files created in Ancestry are stored there as .html files, passed to RM as such and stored by Treeshare as such, but the links are all created as if they were .jpg files.
As I reported in the earlier post, I found JillV’s tip very useful in fixing my broken links.
However, I doubt that that is the problem here, as it would be an unusual Ancestry tree that only had text files in its gallery.