Carbon clincher delaminating

[G321]

I recently bought some carbon clinchers from a reputable wheel builder. I set them up as tubeless but the rear would lose pressure sometimes over a day other times over several days. I tried re taping the rims to rule that out but it kept happening. After one ride I noticed Tyre sealant on the brake track but didn't think anything of it. After my last ride I checked the wheels the next day and found the sealant residue shown in the picture. Is that the brake track delaminating?
They have only done 250 miles and the wheel builder has had them back and told me they're fine while ignoring the photos I've sent. They also said they will only refund 60% of the value.

Has anyone seen anything like this before?

[G321]

Yes they are tubeless compatible, after looking into it and speaking to the wheel builder it might be a problem with the tyre rim interface and not the brake track after all. I'll refit the Tyre and see how it goes

[G321]

They made lots of popping noises as I inflated them and seemed balanced when rotated. I will go through the tubeless set up again and make sure it's all seated properly. I have some IRC's on a set of archetypes which I had no problems with, maybe it is the one pro's that's causing the issue

[G321]

No they were from a different wheel builder. I think that the tyre was just not seated properly I'll try again and if I can't get it to work I'll order some more IRC's