This is still just a hypothetical question at this stage.

I have an award booking on EK (booked via QF). When I booked it, there was a 1h55m connection time in DXB. I've received an email to say a flight time has changed and it's down to 1h50m. The flights are still ages away, so it could easily change back, or even extend longer, so I'm not worried about it.

I just wondered what would happen in the event that my flights were less than MCT appart. Is it up to me to spot that if it happens and contact QF? Or would EK identify it if the flight times did change?