Why would an ex still follow you on social media & occasionally like/comment on your posts?

Anonymous

We ended on good terms even though I now think I was too nice to him as I just left amicably instead of calling him out on his lies (not that he would ever have admitted to it anyway).
I’m still connected to his Instagram but have muted him so I don’t see anything related to him, yet he still sees whatever I share and even liked a post of mine recently over a year on. He dated someone else pretty much a few weeks after we broke up and they’re still together. So why is he still trying to keep some form of connection going? I have no interest in him since the breakup as I saw some things in him that I am beyond thankful for that are not longer my problem anymore.

Updates
4 mo
It’s always been him initiating and maintaining bits of contact while he’s with someone else and I wasn’t too. What’s that all about? He posts about them all the time (in fact it’s 99.9% the only thing he posts) so if they’re truly that happy why is he still bothering me here and there?
Why would an ex still follow you on social media & occasionally like/comment on your posts?
2 Opinion