Bingowings said:

In ROTJ there is a big thing made about The Executor losing her bridge deflector shield allowing for the A-Wing to crash into the bridge window.

In ESB an entire bridge pod is taken out by a rock without any indication of a deflector shield being hit.

Is this worth thinking about or can we mark it down to an unlucky strike?

If it does niggle any readers which of the two films does it create the bigger problem for?

It never bothered me, I just thought the asteroid hitting the star destroyer was a cool shot that established that the fleet was taking some damage during its hunt for the falcon. IMHO it requires no explanation.

It is impossible to make the techy side of SW consistent throughout the entire saga and I don't think it is a good idea to try. If you do you end up trying to figure out how far the kessel run is and what doing it in less than 12 parsecs means and how that equates to the falcon being "on the other side of the galaxy by now", just a second after the star destroyer loses it.