Looks like the search bar background search VS submitting a search behave differently.
Example: Search "Bee Gees" in the bar, get a few results to appear below the search bar. Submit that search and get a webpage that shows zero results.
FWIW, the search bar appears to get data from load_people.php (q="Bee Gees")
the URL from my example is https://remix.audio/search/filter/tracks/Bee+Gees