Spit-lla struggling to keep up with Bombers?

[Doc_uk]

This has happend a coulple of times now, first pass is ok because, i normaly, come in head on, or from the side,
But somtimes not all the time, i go round for anouther pass, and i just cant keep up with them, even diving towards the ground i cant catch them
Its like im not getting full throttle, even though its puched all the way forwards
And then if i restart the mission, its all ok...
Has anybody else notice this?