This was a ranked match, I ended the first round as Ana, switched around the beginning of the end of round cutscene and respawned on the same point while everybody else spawned on the next point :
https:// youtu. be/GmfQvsRsfdw (can’t post link -_-)
This issue has been reported since at least 2021 : https:// us.forums.blizzard .com/en/overwatch/t/spawned-on-the-wrong-map-on-oasis/611620