Weird Compass problem

Hi all!

I have a strange problem with the compass plugin. I've been using it without any issues so far and I just can't understand what's going on now.
It shows North and South correctly but when I turn to the left (supposedly to the West) the compass pointer rotates to the right - towards East instead.
Any ideas why?

Thanks in advance!

Think I've found a solution.
I've changed this

sub(plugin[compass_pointer].rotate, heading, view.hlookat);

to this

sub(plugin[compass_pointer].rotate, view.hlookat, heading);

and it's working now exactly as it should.

Strange enough though...