I logged today on Dregar and it seems the spawns aren't spawning at all... I tried the mushrooms by Prantz, nothing ( and I was alone on the server, tried several times and nothing spawned). Then I went to the south of Forest of Fog and there wasn't any bugbears... no where.
I ask Shamur if he was seeing anything and he said there was no Giants either in the forest.
It seems the fixed encounters are fine, or maybe some spawns are... The Giants by the Peppermint are there and so are the animals.