Receipt Validation fails on Catalyst, but works on iOS

I can easily verify the on device receipt hash using OpenSSL on iOS. However, it's failing on Catalyst.

The following code chunk works perfectly on iOS and has for several years. I reported this: FB7470452

- (BOOL)verifyReceiptHash

{

NSUUID *uuid = [UIDevice currentDevice].identifierForVendor;

unsigned char uuidBytes[16];

[uuid getUUIDBytes:uuidBytes];

NSMutableData *data = [NSMutableData data];

[data appendBytes:uuidBytes length:sizeof(uuidBytes)];

[data appendData:self.opaqueValue];

[data appendData:self.bundleIdentifierData];

NSMutableData *expectedHash = [NSMutableData dataWithLength:SHA_DIGEST_LENGTH]; //20

SHA1((const uint8_t*)data.bytes, data.length, (uint8_t*)expectedHash.mutableBytes);

return [expectedHash isEqualToData:self.receiptHash];

}

I'm not certain [UIDevice currentDevice].identifierForVendor is returning the correct UUID. Even when using a chunk of code to get the correct UUID (matches up in with system information), the verify still fails.

Is there something special about Catalyst?