You shouldn't be telling this to tier-1 support, you should be reporting it through a contact that's labeled as specifically being for reporting security issues affecting Google login, ie https://bughunters.google.com/ . This is a significant security vulnerability because the existence of this TV implies the existence of an API somewhere which the TV has used, which can create revocation-resistant keys.
(I ran into a similar issue with the Oculus/Meta Quest 2 and Facebook login tokens. I reported it as a vulnerability in the Facebook account system and it was fixed eventually.)
(I ran into a similar issue with the Oculus/Meta Quest 2 and Facebook login tokens. I reported it as a vulnerability in the Facebook account system and it was fixed eventually.)