DESCRIPTION: We (3 players) were playing Railjack Defense (Arc Silver, Veil Proxima), trying to do 100 waves, when the defense target suddenly died without any enemies near it, right after the start of a wave. There was one red marker on the map, as seen in the video below, but that was my Kavat - a Radiation effect had previously caused the UI to bug out and display my Kavat as an enemy. You can clearly see that it's there even before any enemies spawned.
None of the enemies that were further away should be able to do the damage either, as they were 1) far away and 2) still moving when the objective started taking damage and lost 72000 HP over just about 3 seconds. The enemy level was also only at about 300, which while high, shouldn't be high enough to delete the defense objective with a stray shot from far away.
EXPECTED RESULT: The mission should have continued normally
OBSERVED RESULT: The defense target was obliterated by an unknown damage source, failing the mission
REPRODUCTION RATE: ?/10 (first time i've seen the bug, 3rd time i've attempted a 100 wave railjack defense (and first time i've failed it)