I feel your pain.
Way back when, I was hosted on a windows server.
Never could get path_info to work after a server upgrade.
The it department was at a loss.
It finally got to every time I researched it ,it was a different fix and they obliged every time.
Some fixes were security risks.
The issue was it did work and they upgraded IIS and it stopped working.
It was years ago so I don't recall the versions.
As I recall it was something about fast cgi mapping.
The only difference for me is it was a shared hosting plan.
So I had to rely on it support to make changes
They told me they changed every setting I advised them about.
Anyway I finally moved to a linux server.
No more issues with Path_info.
