Interesting article on an issue that's of concern to many of us.
https://gizmodo.com/how-facebook-outs-sex-workers-1818861596
Question is... how do you avoid this? I suspect a lot of it is because everyone has FB on their phones, and when two phones are together for a while... their owners must be too, right?
This stuff is very hard to avoid, but I'd suggest a few things.
Having separate phones for your normal and Lyla-related lives is a sensible precaution, even if you don't have a SO to hide it from. Don't access your more illicit accounts (here, Twitter, email, etc) from your real-life phone, and vice versa.
If you can, turn your civvie phone off when you're meeting someone for shenanigans (preferably a bit before you get there, and leave it off until you're well away afterwards). If you can't do that, at least turn off the location services, and wireless/data too if possible. That means FB doesn't know quite where you are and can't find out. Removing all FB apps from your phone is probably best of all, but that might not be a viable option for a lot of people.
And finally, if you ever do get an inappropriate suggestion for someone you may know on FB... at the very least, ignore it. And better yet, block them so it doesn't happen again.