well, it looks like it is exactly behaving as expected though...
on (very) dark color themes--say, almost black, as you seem to be showing in the provided screenshot--the drop-shadow to each connection line is a white shade (would be black otherwise); what you're seeing (and I see too:)) is a bunch of a lot of dense connection lines that superimpose each and every other and it just, well, enhance the whiteness of the the aggregated white shading--faint white becomes whiter and whiter... get it?
on the other note, as kindly said before, don't count on Graph to manage ardour connections; those should be managed inside ardour premises anyway.
you may just move that whole awful spaghetti away to some far and hidden side, and then just painlessly deal with the other little fellows in the center of the Graph ;)
well, it looks like it is exactly behaving as expected though...
on (very) dark color themes--say, almost black, as you seem to be showing in the provided screenshot--the drop-shadow to each connection line is a white shade (would be black otherwise); what you're seeing (and I see too:)) is a bunch of a lot of dense connection lines that superimpose each and every other and it just, well, enhance the whiteness of the the aggregated white shading--faint white becomes whiter and whiter... get it?
on the other note, as kindly said before, don't count on Graph to manage ardour connections; those should be managed inside ardour premises anyway.
you may just move that whole awful spaghetti away to some far and hidden side, and then just painlessly deal with the other little fellows in the center of the Graph ;)
my 2c. of course
cheers