If you cross-play but do not have Lightfall, and therefore Strand, on the other platform, you become locked to Prismatic if that's the last subclass you played on your platform that does have Lightfall/Strand. This is because you cannot select a different Light or Darkness subclass until you swap to that selection hub. Reproduce: Select Strand on platform that has it. Swap to Prismatic Load up cross-play account on other platform that does not have Strand/Lightfall Character can now only use Prismatic