Please update us if changing this setting seems to work for you. I just checked my settings, and we already had this option turned off, and we were still having the issue with the store posts, so I'm a little skeptical that's the fix. That being said, I haven't seen these posts from our Facebook page recently, and we've been adding a ton of new products the last few weeks.
I changed nothing at all. There was apparently an update on Shopify and somehow this disconnected my account (without affecting the status of our shops, etc.). And I haven't seen the issue pop up again. I also haven't reconnected my Facebook account just because I'm scared to see the issue start again.
Here's the change I made in my Facebook page settings, as advised by graham_co:
Business Page Settings > Page Updates > click on Edit > and turn off post notifications so that they don't automatically update every change
Sadly, turning off the notifications doesn't work. My Facebook page has had notifications turned off the entire time, and we still get these "added to shop" posts showing up. I hadn't seen one in a while, so I was hopeful they had stopped, but I just added some new products the other day and had a bunch of them go out.
Same problem here. It started noticing yesterday: added 5 new products and had prepared a campaign of posts to go with them but Facebook did it before me so followers started liking those empty bland posts, rendering mine completely useless. This is VERY annoying and stupid. "Pages updates" option has been already unchecked for a long time so it is NOT the solution. I hope someone at Facebook is monitoring this and FIX IT!!!