At least in the Ju 87 B-2, it has recently become impossible to dive bomb without breaking the prop. I’ve made explicitly sure to set the engine to full idle, deploy the air brakes before I even turn over, and made sure I’m no higher than 3 kmh in altitude, but my prop is breaking all the way down at 530 km/h. This is consistently replicable, and I have yet to find a set of conditions that are consistently survivable.
This sounds like the bomb is hitting the prop (as props don’t break with airspeed).
Make sure when you’re dive bombing you don’t do any further “nose-down” movement of the plane when releasing the bomb. Even slight nose up when doing bomb release just to be sure.
(and make sure you’re not completely vertical downwards)
At first I though it might be the bug affecting the BTD where when the bomb is released it teleports forwards first through the fuselage and then prop which can break it. But it does this in level flight and is easily identifiable. I took the Ju 87 B-2 out for a test flight and couldn’t get it to do this