Just did the first wing of Emerald Nightmare on LFR and first two bosses failed to drop loot - couldn’t even interact with the bodies. Left after that. And I haven’t touched the raid for over a year, so it wasn’t a lockout thing, I believe. I may try later on an alt for testing, but I thought I would post here in case anyone else is having issues like I am.
Update:
Ran on an alt and first boss dropped loot. Could just be a freak thing for me, but I play too much not to notice something off, so I will leave this data point out there for now.
Update 2:
So this problem happened again on Spellblade inside Nighthold LFR. I have a working theory now on what is happening. Each instance this no loot situation happened, I had fired a ranged attack that one shotted the boss. When I did something like spell steal first just to have the boss fully engaged with me before 1 shotting it, I did get loot. So there might be some buggy interaction happening where a trinket or some proc is effectively killing the boss first before it registers that I’m involved, resulting in it dying without offering any loot to me. I’m leaning towards the trinket I have named “Runecaster’s Stormbound Rune” because it has a lot of random free damage, and it particularly states, “This effect triggers immediately when striking a creature for the first time.” So my shot in the dark guess is that somehow my trinket is killing these things too early and the game fails to recognize I’m involved, thus no loot.