Wow. Same thing happened to my group tonight. Spawned the sword breaker in that back area for some reason. No joke like 4 hours my group who never struggles did so to constant bugs from crota shield gone but not going down to sword disappearing. We felt defeated. Nothing we did could succeed because another bug would mess things up. Fix your raid. It's broken as all hell. Getting smashed by knights before the glass is down is pretty uncalled for and defeats the purpose of the glass. Fix it. I can't get my 4 hours back so redeem yourselves and fix it soon.