AH Mk.1 Apache - Starstreak

Hey, - mode PVE
after firing 3 Starstreak missiles on the AH-64D (British variant), the aiming reticle/box disappears, even though there are still missiles left.
This happens consistently for me—after the third shot, no more box shows up on the TADS, making it impossible to properly guide or confirm launch constraints for the remaining one.
Is this a known bug, or is it intended behavior? Or am I doing something wrong?

Thanks for any insights!