Guerilla Attack Pod & Energy Conversion Lab

The Energy conversion lab card info on the star wars unlimited website says

“Ambush is an ability that triggers at the same time as “When Played” abilities. If there is no enemy unit that can be attacked, the unit does not ready.”

But when I played with my friend he used the ambush to attack my unit then readied the attack pod again.

I’m aware the card also functions like that on force table but it seems like an error to me?

Any clarification is much appreciated