SpaceX successfully deployed the first third-generation Starlink satellites on Friday using an upgraded version of its prototype Starship — the 13th test flight of its mega-rocket to date. But the company suffered another failure with its Super Heavy booster during a planned simulated landing in the Gulf of Mexico.

It’s the second time the company has had an issue with the Super Heavy booster on this V3 version of Starship. In May, on the first Starship V3 flight, SpaceX encountered a failure of the Starship’s Super Heavy booster as it separated from the upper stage of the rocket.

The launch came a little more than a week after SpaceX tried to conduct the 13th Starship launch. That attempt had to abort immediately after ignition due to a number of rocket engine failures. SpaceX said it replaced six engines ahead of Friday’s flight to fix the problem.

During Friday’s launch, the booster made it further into its planned flight, but wasn’t able to properly fire up all of the engines required for its simulated landing burn. The booster exploded after a faster-than-expected impact with the water.

This was the first launch of Starship since SpaceX went public in June in the largest IPO in history. In a test of SpaceX’s “fly, fail, fix” approach to Starship development, the company saw its stock decline last week in the day following the launch abort. The dip is part of a larger downward trend since the IPO that has seen the company’s stock drop from a peak of more than $200 per share to $115 at the close of trading on Friday. In after-hours trading, SpaceX shares fell another 2% following the booster failure, before paring some of those losses.

SpaceX appears to have had better luck with the Starship V3 upper stage during Friday’s launch. The upper stage lost a rocket engine during the first V3 launch in May. That didn’t happen this time around, as Starship encountered no issues on its way to deploying the new Starlinks.

The new Starlink satellites are expected to burn up in the atmosphere roughly 20 minutes after deployment, as Starship still isn’t capable of reaching Earth orbit.

This story is developing…