Opal picking up on iPad screen time even without sync.

I’m not sure if this is a bug or me using Opal incorrectly. I have blocks after 15m on youtube.com and reddit.com that reset daily. I haven’t used those yet on my phone (Opal screenshot as proof) and yet they were blocked as soon as I opened them. The only thing I can think of is that I was on YouTube on my iPad after midnight—whenever that’s the case this premature block seems to happen. My screen time settings are definitely not shared across devices. What could be going on?