kind of ambiguous wording (is this hotfix rolled out as of this post, or is it being rolled out in the coming days)
We have identified the issue and are now releasing a fix to resolve this. A restart of your game client will be required to benefit from this change. We will continue to assess things over the coming days
either way, thanks for getting onto this before the weekend. loading up the game now to see if it's fixed. will edit with updates
edit: it's fixed but man oh man the blackscreen bug's still there. also some stutters every now and then (never used to occur previously) but much more tolerable than the mouse input bug. game is now playable on PC.
Update is now live. :)