I realize you probably don't want to for personal reasons, but have you removed your father from your phone book? I didn't remove mine for the longest time, th

I realize you probably don't want to for personal reasons, but have you removed your father from your phone book? I didn't remove mine for the longest time, though his number has long been reused by someone else; I only did when I finally got a notice that that person joined Signal and Telegram. Too spooky to see "[your father] has joined Signal!"