Try this two options:
- Disconnected internet with PSN. (And possible option to reconnect)
- Change resolution to 720P.
On this page more information about changing video resolution: https://support.us.playstation.com/app/answers/detail/a_id/523
I don't think it has anything to do with the PSN maintenance, because I saw another post where some guys had the exact same problem during the beta, which was way before the maintenance...