Walleyes not locking after Alpha Strike

I’m not sure if this is a bug or not, but whenever I’m using the A-4E I can’t get the walleyes to work. Before the update I could just hit the fire button and it would start the locking sequence, but it doesn’t to that anymore. Tips?

You need to activate secondary weapon mode and switch to Walleyes before launching them.

Same problem occured on Swedish Gripen, if you dont activate Weapon modes you cant fire Mavericks.