Kindred doesn't always seem to remember her attack command after Q
It feels about 80% she forgets when you attack commanded on a structure and she'll just stand there, but seems like 25% of the time she forgets that you told her to attack a minion or champion.
It may be more expansive than this, but I notice it more when I'm already attacking the relevant target and Q while I've already fired off a few AAs.
Sometimes when I Q near a structure that I'm AAing, she'll fire her Q bolts at nearby minions, AA one minion once, and then stop.