Good Morning,
I recently had the factory remote start system installed my 2015 Legacy and, assuming all things are equal, have not had this issue. My vehicle will not allow me to remote start without the doors being locked before hand. When approaching, I tend to grasp the door handle and enter the car that way without touching the fob.
The fact that the car turns off is a slight annoyance, but a small price to pay for it being warm (or cold) depending on where you live! I would be curious to see the results of this small test: when approaching the car, press and hold the button on your remote starter for a few seconds and turn the car off, then open the door. I would be willing to bet that the alarm wouldn’t go off. Since the car shuts off anyway when the door is opened, you wouldn’t be adding much “down time” between shutting off and turning on by using this method.
I would imagine this is not supposed to happen (as it seems silly especially if you have the fob) but it may not be worthwhile inconveniencing yourself to bring in for Subaru to diagnose it if the above suggestion works.
Regards,
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