I didn't think you could die in the TA unless you collide or auger...
Damage against planes from another's planes guns is set vey low,basically 1000 rds equal 1 round in the MA.
However the bomb damage has been adjusted so they can damage objects,to help with practice for the Coral Sea event.
This means if someone drops a bomb on a plane thats on the RW it will explode! This is against the rules and the offending player will be dealt with.
It's not a bug and since killshooter is off the player dropping the bomb/s will not die.