Stealth nerf in latest patch

[Kordaal]

I have a 54 Druid. I've been camping SolA for Kindle's gloves for the last several days. Sitting in the room, there are 3 spawns plus the wandering ph for Kindle. Yesterday, it was trivial for me to hold the room. I'd log in, hit each one of the 4 with Breath of Ro, it would tick for 103 damage, and I'd let all 4 of them beat on me til they died, and be at 85-90% health when it was done. Rinse, repeat.

Today, after the patch, I log in and Breath of Ro is ticking for 92 and I'm getting wrecked. They are doing WAY more damage to me, and one cast of Breath of Ro wasn't enough to kill them. I had to gate out at 17% health with 3 out of 4 still alive.

I see nothing in the patch notes that would explain 1) my dots doing less damage per tick or 2) 20 level below greens doing 5x more damage.

Wtf is going on?