Export - takes 20 minutes unless I constantly move the mouse

Mac pro 8 core trashcan 64GB RAM

All the time I export songs it slows down strongly if I just let me computer be.
I have to constantly move the mouse, when i do so i can see the reamining time estimate go down to around 1.30 min.
if I dont it jumps up to 9 min and sometimes takes 1 hour…

anyone any idea?

Now that is bizarre.

I’d suggest putting in a support request, but you’ll have to be patient. It can take a really long time before they respond.