HK, whenever you lose in-game resources it’s always worth submitting a support request ticket. You never know what else could have gone wrong wherein the only obvious indication was that something “went missing”.
You can be sure that even without screenshot proofs, Sirrian pointed out here that they will check your claim against a backup of the the database taken from before the reported incident. So, no need to fear that your claim is unsubstantiated, especially when many others have been having the same problem.