Why is my ex popping up on my suggestions on Snapchat?

I deleted his number a long time ago , don't have him on social media have no mutual friends. I only started my new Snapchat last night and this morning I log on and the quick add suggests my ex boyfriend. Does anyone know why?

I thought id have to at least have mutual friends for that to happen. Is it because he still has my number?
Why is my ex popping up on my suggestions on Snapchat?
Post Opinion