Hi there, welcome to the forum.
Unfortunately you were to quick to take off which in the end lead to the Auto land due to the DJI Fly Safe Geo Map Authorization zone around the Puerto Escondido International Airport. If you had waited in full GPS lock & HP recording you had been given the message about the authorization zone & been stopped from a take off.
As seen here you had Navhealth 0 all the way to 19sec after take off meaning no HP recorded & the Fly app didn't know were from on the globe you took off from.
At Navhealth 2 coming in at 21sec the Fly app gives a message regarding the authorization zone (see further below) & a bit later you get your HP recorded in the wrong location out in the sea, at 24sec.
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Once reaching 10 meter height (which probably were a limit for auto land in that authorization zone) auto land starts, in approx 7sec you don't do anything but then reacts with negative elevator trying to back in land then followed by 2 shorter positive throttle inputs to stop the descending, the last second before the AC hits the water you also help it go under faster by commanding descending with the throttle.
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This was the DJI Fly Safe Geo Map that commanded the auto land ... your flight spot market with the red cross.
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