u/Icy-End-2392

Hey there!

I'm knitting the Xanadu Pullover by Kiddiwinksknits.

I'm very new to colourwork, even stripes, and knew I might have a problem with the white yarn being unstretchy cotton/acrylic paired with the rainbow yarn which is 100% unsuperwashed wool, much more elastic. The white rows are bubbling out, guessing they're being pulled by the row of white slip stitches over the 4 rows of wool colourwork.

I don't mind the bumpiness enough to frog but would like to learn before I do any other more intensive colourwork projects, is this bumpiness caused by the difference in yarns? or something else? and what could you do to prevent it in future?