Yeah it sounds like a bug where the effects of the explosion arent being implemented across the rest of the airframe (except maybe the fuel level)...
Certainly there is no way the structural integrity of the aircraft could survive an explosion of that size - it's a massive fireball that would consume the pilot for starters!
Plus the exploding tank would send shrapnel through the rest of the fuselage.
still though it's a great visual effect, hopefully the devs can fix the damage model to more accurately reflect the impact of the explosion, I would expect wings to fly off at the very least!