That's what I was wondering, but if it's off in the engines it should require an software change right?
..."better fuel mixture?" 
Did they got the mixture ratio of the engines a bit off? Or loaded not quite enough RP-1 or LOX? https://twitter.com/SciGuySpace/status/1338982770085916678?s=19 …
Just finished a call with @Astra. Rocket was 0.5 m/s short of orbit. With a better fuel mixture in the upper stage it would have orbited. Apogee of 390km. Rocket 3.3 will carry a payload, and there will be no hardware or software changes. 
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Or a pipe that is more thick?
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They ran out of kerosene but still had a little LOX left.
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Well at least they don't need to worry about a de-orbit burn
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