Just to follow up here, and to share what I’ve got

“Invite to Snapchat” from my contacts, with their specific names: “Invite to Snapchat” from my contacts, with their specific names and the permissions for Snapchat, showing contacts is not allowed: the permissions for Snapchat, showing contacts is not allowed

After looking at this, I set everything to “ask every time”. I also removed access to the phone app… I haven’t talked to almost anyone on that list on the phone, but I figure it couldn’t hurt to further restrict.