I've reported that too; try looking at my hair sim tut. There's a point I suggest to check in it. Not sure which vid (but probably the second one). It has to do with the checkbox being checked for self collision on hair, when it shouldn't be. I think. If that doesn't work, try a different hair; on occasions, I seem to get more issues with a specific item than others.

The vids are on: https://www.youtube.com/channel/UCKzRtu0dYy0uC7MDU-C6WXA