[Pontiac]

During the launching, the Briz-M booster activated as scheduled but switched off after only seven seconds instead of the more than 18 minutes

This to me sounds like a safety system shutdown.

The rocket booster’s monitor computer detected an unsafe condition and shutdown the booster after 7 seconds.

This could be something like a valve that failed to fully open in its allotted time of a bad temperature sensor.

And talking about a bad sensor could be they are buying Chinese parts.

[dr_lew]

Mmmmm. Well, as a matter of policy, one should never gloat!

[The Cajun]

And talking about a bad sensor could be they are buying Chinese parts.

Nah, they buy them from Walmart.
Oh, that's right, never mind :^)