The 320s have had composite parts forever. So have virtually every plane since then, The 787, for all it's other faults, hasn't had this issue, and uses a more

The 320s have had composite parts forever. So have virtually every plane since then, The 787, for all it's other faults, hasn't had this issue, and uses a more radical design for it's 787, versus the A350 which still uses stringers and panels, rather then put more load on the CFRP. But that said, given that Lufthansa is also apparently pulling and repainting it's A350s, there may be some reaction here.