The problem is both, and Ukraine is arresting people who film them. It's martial law, both countries are at war and truth suffers (understandably).

> What is the purpose of arresting your missile scientists for treason? What’s your best case interpretation?

I don't know, I would guess:

- They said something about the Khinzal that downplays the importance of the weapon.

- They said something that would help Ukraine better counter them.

- They said something against Putin or the military invasion.

What they very likely didn't say is that the Khinzal is a hypersonic maneuverable weapon, which is the point of TFA you're commenting about.