This seems fixed for me with your patch.

In real real life, I made it so that while-no-input only covers the
computation needed for the minibuffer hint (counting matches) which must
be interruptible, but not the sit-for used to delay the minibuffer hint
being removed.  That sit-for was inside while-no-input originally was a
matter of laziness, I was able to rewrite it to circumvent the issue.


Thanks,

Michael.