It's not a timing difference, one ECU controls the left engine and takes input from left weight-on-wheels sensor, the other controls the right engine and takes input from the right sensor. This is by design, it ensures redundant operation. It was just unfortunate timing that wheels on one side were up in the air while others were on the ground when go around was issued.
> the video even emphasises that it is not banned in Europe
No, what's strictly not demanded by EASA is that the manufacturers enable safe application of go-around thrust even if reversers have been deployed. Airbus implemented this nevertheless, but that was only tested with both wheels on the ground.
> the video even emphasises that it is not banned in Europe
No, what's strictly not demanded by EASA is that the manufacturers enable safe application of go-around thrust even if reversers have been deployed. Airbus implemented this nevertheless, but that was only tested with both wheels on the ground.