Forest Dryad Push Effect Bug

There’s a bug with the Forest Dryad’s ability. I activated the ability last night on around 7 or 8 mobs and only three or four actually started moving away. At first, I thought this was a connection issue and went to sleep but in the morning I woke up to find the other players have also reported the same problem and the mobs are still where I left them last night.

Here’s the game.

Below is an image of a supposedly affected stack that isn’t moving