Sahuarita, Arizona USA 2018 Forester Limited
I've had this exact problem with Discount Tire. The Subaru lug nut torque spec for my 2010 is 58-72ft-lb. However DT's spec is 80 ft-lb. I had multiple broken studs twice before I figured out what was going on.A lot of broken studs is due to the lug nuts being removed/installed with air tools. As well as being over torqued....
I was having issues with my favorite @Discount Tire until I got them to stop using air tools on my Subarus. Even though their 'torque sticks' were supposed to limit torque. The high speeds plus following the wrong specs... were creating havoc. Specs for mine is 73.8ft-lbs... 2014+ is 89 ft-lbs. Which is quite a difference.