This was kept quiet for a while, article below. Doesn't look like the 787 holds up to lightning strikes as well as an aluminium hull. My experience is with metal airframes but I have been involved in assessing lightning strike damage on composite tips and flight controls, usually the copper mesh gets burnt and there are scorch marks on the composite but no perforation. Looks as if the panels are not electrically bonded correctly to provide a path for the lightning through the aircraft and out of the static wicks.
https://www.smh.com.au/business/comp...17-p5am1p.html