Bosses Drop No Items When There Are Two Bosses

In Atlas maps, when there are two bosses, if one boss dies, the other one often dies automatically at the same time, and no items drop.
When one of the two bosses dies, the other immediately dies as well, the map just clears, and the bosses drop no loot. However, if one boss dies and the other does not die automatically, and I deal damage to kill it manually, items drop normally.

This bug happens frequently, especially when fighting strong bosses that often spawn as two at once, and it’s very frustrating not being able to get any loot. Please let me know the reason and fix this issue.

I am currently playing with a Poison Pathfinder build for dealing damage. Please check if this problem is related to my build.

Same issue as well. Killed the two bosses in Derelict Mansion simultaneously, 0 drops.

Just had this happen on a T16 juiced double-lumberjack with a poison build. They died at the same time, dropped nothing...

same( one week oO )