Dying and respawning in corrupted nexus map prevents nexus completion

After entering a map with corrupted nexus, even if there are multiple respawns available, dying once makes it so that killing the boss doesn't complete the corrupted nexus and doesn't give atlas passive points. This is a major bug that I don't understand how it's even in the game. I 100% assume it's a bug because if it's by design then you guys have a serious problem you should deal with before you continue to work on this game because no one wants to play a game that works this way (and yes, I got the tornado bird boss that I died to, that you just simply can't fix for some reason even though it's been a year, because you don't play your own game and you have no idea what's going on).