Actually that doesn’t make sense to me - why would the telemetry vanish? I get wanting more data, but I don’t understand how it would be lost.
If the craft burns up on re-entry due to many possible factors (Angle of descent, speed of descent, uncontrollable trajectory, etc, etc) any evidence of faulty components would be 'disappeared'.
This story is incredibly sensationalized because it's fashionable and gets clicks right now to spam anything even slightly negative about Boeing.
/s
Beam me down, scotty!