Brett develops a pellicle, look up some images on line. Yours could be a combination of pectin clumping and pellicle from Brett. A previous poster talked about sour and tart flavors. I agree these are consistent with brett or wild yeast, I personally think that's a good thing. It needs time to blend and mellow, but I think Brett compliments cider well and I would argue it is more similar to the traditional ciders made on farms (by wild yeast) than the neutral champagne and mead yeasts we've gotten use to. I say it's fine, give it time, rack it twice. I typically let my Brett items run 3 months (with a pellicle) before I rack them.