In R&D things blow all the time.
You just usually don't see it. In labs when they are looking for new drug or vaccine - thousands of variants fail. And it's ok. When you are developing anything new - you do thousands of try and fail. IF you don't - then you will even ever invent anything new. The best you can do is a little bit upgraded iteration.
And here a few fails and it is disappointing?
Nope. Its the only way to discover something new.
There are world's of difference between a prototype accidentally blowing up because a design fault was unnoticed up to that moment, and this absurd spin on this accident about how these accidents are sought after and desirable. They aren't. They are always problematic and a setback, and in some projects even project-killers.
So, enough with the bullshit about how this accident is good news. It isn't. Even if the project can easily recover from this setback, it's still a setback.
And here a few fails and it is disappointing? Nope. Its the only way to discover something new.