Sign In with Apple ID does not work with security keys
I've enabled and added 3 security keys to my Apple account. Logging in the web or device to iCloud/AppleID portal works flawless. But if I try to login to a 3rd party service that uses the Sign In with Apple in a non-Safari browser I never get a prompt for the security key and instead I'm getting an error "Your request could not be completed because of an error. Please try again later.". In Safari it works as it prompts for TouchID.
Is this a known issue of using Security Keys in your Apple account?