Does it feel oily when you rub your fingers together?
If not, I would say that it is just some of the pigment that has risen to the surface.
With each coat, this should settle down.

Try gently wiping it with a soft lint free cloth to remove some of the surface pigment before applying the next coat.

Once you get a few coats of the final on this should stop happening.

With your previous question re the colour going a bit orangy, that would be the Basswood.
Being slightly green coloured it may have changed the hue slightly..

Keep me posted on how its going and feel free to email me at dingobass at pitbullguitars dot com if you need more help or advice