Hmm haven't seen that yet personally but I'm sure YouTube is always trying things to get around adblockers and probably A/B testing it on various accounts or countries. You could try making sure unlocks rules/definitions are up to date.
Unrelated but I also have been using sponsor block which skips over in-video sponsors which is nice. Though it's community updated so very new videos might not have the sponsor segments marked yet.
How old are they? We bought an LG TV 1 or 2 years ago and it has a lot of online features and keeps prompting me to make an account and accept various terms and conditions for their advertising or to let them listen to the microphone and such. I think it's mostly optional but they don't make it easy to opt out