Annoying hangup with "man"

[David Karr]

I'm using GNU emacs v28.2 on Cygwin 3.4.6-1.x86_64.

For quite a while now, I've been running into a very annoying bug with the
"man" package.  When I execute "man", if I type the item I want info on too
quickly, it hangs Emacs completely, and I have to kill it and restart it,
losing anything I was working on.  If I'm careful and type slowly, it
doesn't hang. This often happens after only entering one or two characters.

It appears that it hangs at about the character where it would start to
provide completion proposals, but I've seen it happen before that. Today
I'm testing it with "curl". I saw it hang after entering "cu", but then
after a restart, it happened after just "c". If I just put my hands down
after the prompt appears and wait a second or two, I see the completion
proposals appear after "cu".