See below a posting I put on last week, in response to Peter noticing BA had cancelled his flight.
Again not sure if this is related to what you guys are experiencing. i
• Morning Peter
Not sure if this is related to your issue, but just in case
My corporate booking website had a warning to advise of ongoing issues with BA booking…….
“Unfortunately there is a known system issue with British Airways resulting in some domestic bookings to be automatically and inaccurately cancelled”
If I notice my flight is cancelled I have to contact my booking company direct