Use the BA app for my flights (Android), and also the AA app if I'm flying fully or party with them.

I've got a few upcoming flights with multiple sectors, but the apps keep missing out some flights.

I.e.
SOF-LHR-SFO-JFK-LHR-SOF misses out the SFO-JFK flight on the BA app, but shows it fine in MMB and the AA app.

The AA app might miss out the SOF-LHR flight but show everything else.

The BA app, even though refreshed, cookies cleared, logged out of etc., doesn't always show the correct times.
Got an ORD-LHR flight that it shows as going at 9:35pm or something. The connecting flight from BOS arrives at 7:35pm original booking details).
Looking at AA, they've got me on a BOS-ORD flight arriving at 2:35pm as its obviously been changed, but BA haven't caught up weeks later. If I didn't check, I would be unaware.

I've had various aircraft changes on both airlines, schedule, seat etc. changes, yet BA seem to brush over most of these, with AA being a bit better and/or MMB being so-so.

Must admit, BA did email me a couple of times about NCL cancellations/ rebookings, so sometimes something works.