They have removed the ability queueing system for summons with this (steath?) change. There are two safe ways to use Enkindle now, either steadying before giving the Enkindle command (will cancel any current ability being used and wait for a command, such as Wind Blade) or to watch the pet cast bar and make sure to input the ability when there is nothing being cast.

Basically, what was once a one input command is now a three input command. It went from just [Ability] to [Steady > Ability > Obey] for the same effect and even a slight DPS loss if you cut an ability cast off with the Steady command. This makes the class a little harder to play as effectively but shouldn't be too bad with some practise.