Ran into an issue, playing solo, where the boss of the second encounter became invincible after shields were taken down in the second encounter. I'm on Steam, but this doesn't seem like a system issue so I won't be providing system specs. TL;DR By using a pitfall at the end of damage phase, boss becomes invincible and the activity cannot be completed. 1. I got taken apprentice and rotated through all three rooms, interacting with the modules there. 2. Starting the damage phase, I rotated the room and opened all the coils. 3. I went through one damage phase having the boss damage the coils to prolong the damage phase. 4. I went through the second rotation through the three outside rooms and started another boss phase, using the pitfalls to lower the shield 2/3 times. 5. I rotated through the three rooms again to get the pitfalls activated again. 6. I started the damage phase, using only one pitfall to fully drop the shield and begin the damage phase. 7. At the end of the damage phase, I triggered the other pitfall as his shield came up, getting 1/3 removed. 8. I rotated through the three rooms again and started damage phase. 9. I used both pitfalls to fully drop the shield. 10. BUG: He was invincible and no more rotations through the three outside rooms could clear the bug. I was forced to reset my run. This seems like a situation where the visual cues of the shield bar and its logic have fallen out of sync with the counter for initiating boss phase, preventing the encounter from proceeding?