Probably just other usages of "im Urlaub" improved, like "im Urlaub erlebten wir das und das", "im Urlaub hatten wir schönes Wetter" and so forth. "In Urlaub" as in previously remaining there, would seem entirely Mistaken in Upper-Austrian, but I don't learn about the Germans. I've also heard about "auf https://bihlmayermedia-bilder.com/urlaub/wir-sind-im-urlaub/