Unable to copy asset attributes console error - AVSpeechSynthesizer

Question

My console is getting spammed with these errors:

[MobileAssetError:1] Unable to copy asset attributes

Could not get attribute 'LocalURL': Error Domain=MobileAssetError Code=1 "Unable to copy asset attributes" UserInfo={NSDescription=Unable to copy asset attributes}

Copy matching assets reply: XPC_TYPE_DICTIONARY { count = 2, transaction: 0, voucher = 0x0, contents = "Assets" => : { length = 1237 bytes, contents = 0x62706c6973743030d4010203040506636458247665727369... } "Result" => : 0 }

Copy assets attributes reply: XPC_TYPE_DICTIONARY { count = 1, transaction: 0, voucher = 0x0, contents = "Result" => : 1 }

It is very annoying when it starts spamming a console. I've read that something like disabling OS_ACTIVITY_MODE can suppress these logs, but I would like to find a source of it and handle it as it should...

This is happening because I use AVSpeechSynthesizer, like this:

  self.synthesizer = [[AVSpeechSynthesizer alloc] init];
  self.synthesizer setDelegate:self];
  self.speedCameraAhead = [AVSpeechUtterance speechUtteranceWithString:NSLocalizedString(@"Caution: Blah blah blah!",nil)];
  [self.speedCameraAhead setRate:0.5f];