Anyone know the facts behind one of the two French Mirage 2000N aborting display

I was at RIAT Fri 17, Sat 18 and Sun 19 July.

On Saturday 18 July the two French Mirage Mirage 2000N tactical display was superb.

On Sunday 19 July soon after what looked like a normal take off of the first Mirage 2000N, the second Mirage 2000N took quite a lot more runway to take off.

Shortly after take off, one of the two Mirage 2000Ns came back in to land shepherded in by the other Mirage 2000N keeping close visibility on his engine exhaust.

The single Mirage 2000N continued with a solo display.

Does anyone know the facts behind what caused one of the Mirage 2000Ns to abort their display on Sunday 19 July?