Claim it.
If Kabam does do a claw back, they will need need to temporarily freeze your account anyways (even if you are innocent and don't hit claim) while they delete it out. At this point, might as well claim it and hope they don't do a claw back. Either way, no downside to claiming it and opening the crystals, especially since Kabam has had all day to address the issues and has been quiet.
Claim it, open it, level it, rank it if you can. Make sure to hide it from simple data so they can't claw it back from you!
Kabam can't even send out compensation correctly. Putting a lot of faith in their ability to clawback 100% from every person.
Roll the dice baby, and congrats!!!