Simular incident, but I'm the afflicting side. As a P-47 ran past me, I fired a burst of single 20mm gun from the 109.
I clearly saw the engine part was hit, and fumes and fuel started trailing the P-47, and also saw the fire. I am aware that sometimes, heavy hits to the fuel tanks cause fires on planes. This happened in AH1 too(except it usually seems to be associated with A6Ms..).
Now, the P-47 pilot, maneuvered on without thinking of bailing. He said that the damage showed only fuel, and no other signs.
It seems that there are several problems working at the same time here. #1 seems to be that pilots don't have enough feedback on whether their plane is buring or not - maybe some kind of sorting problem makes it very hard to see fires from the cockpit of the P-47?
#2, seems to be that damages to the fuel tanks almost always results a fire in the P-47. If this is supposed to be feature, then clearly, other planes are not experiencing it.