I gotta disagree with that. German propellant could be set alight and would make a big fire, but it did not do so nearly as rapidly or with such explosive release of gas pressure as Brit propellant. This gas pressure is what tore the Brit ships apart, where a German ship with the same amount of propellant burning would just have a fire, due to an absence of such high pressure.
When Seydlitz had her big fire at Dogger Bank, propellant in the actual magazines was on fire. Nobody was afraid of that blowing up the ship, but were somewhat worried that the heat might eventually cook off shells stowed above. However, the Germans were able to put the fire out before this happened. And some of this was in the actual magazine, mind you. The fire caused no structural damage beyond ruining the temper of the heated metal.
This Seydlitz fire involved like 10 times the amount of propellant that Lion had eventually erupt in the ruins of Q turret. But that small amount of powder blew the roof off the turret above and stove in the magazine bulkheads below, no doubt ruining their flash integrity. Very likely, flash would have gotten into the magazine and blown Beatty to bits had the magazines not already been fully flooded by then.
This difference in propellant volatility continued into WW2, despite both sides reformulating their propellant by then. Hood blew up just like the Jutland BCs. Barham blew up while rolling over, which also seems to have happened to Queen Mary at Jutland. OTOH, Gneisenau took a bomb in the forward magazine and all that did was make a big fire.
Thus, even though the Brits had superior flash protection, they also had much greater need of it. And it looks like if flash found any gap in the defenses, the ship was still going to blow up, even in WW2. That doesn't seem to have been a German problem in either war.