The Twin Boss doesn't come out to fight

Issue Type (Required):

Enemy Mechanics

Issue Description (Required):

Through the Special Enemy Radar mod, it was observed that the boss had already spawned before the players placed the first bomb—but it was completely invisible. After placing the bomb to blow open the wall and moving to the next area, the boss was forcibly removed from the game, and the Twin Boss would no longer spawn for the remainder of the mission.

Mission Name (Optional):

Mercantile HL-70-04

[PC] Do You Use Mods? (Optional):

Yes, but I haven’t tried disabling them

Reproduction Rate (Required):

Common (<50%)

Platform (Required):

PC - Steam