I suspect this is just BA's random IT, but

• I'm flying (hopefully) to ZRH->LHR->NYC on Sunday. The "my executive club" screen says I need to enter further information, which normally indicates a lack of Advanced Passenger Information.
• If I do Manage My Booking, the old format MMB comes up (hurray!) and shows API is completed (green tick). There's a banner at the top (expected) saying "Your flight is due to depart as planned but, in order to offer you more flexibility, we're giving you the option to move your booking." - so far so good.
• My first flight (BA0713 on 24 Jul) is showing in red. However, nothing says it's being disrupted - I've certainly received no notification. I am aware of a glitch where the flight shows in red if it once was disrupted but now is not. As far as I can tell this flight has never been disrupted (surprising as that might seem these days). The flight is shown as zero-ed out on ExpertFlyer, but that could be just because it is full; seatmap (yes I know this is not a good indicator of load) shows 2/3 full, and I still have a seat.

My guess is that the red banner at the top somehow causes one flight to be marked as red?