Why does my Instagram post keep getting liked when I didn't like it or why does my Instagram post unlike when itself I liked it?

It's been happening to me a lot in the past few days. I thought it was something to do with my App, but Instagram does not really have a responsive support staff centre so I did all the things to secure my account but I don't know if it is anything to do with my device.

Has anyone had this problem before, and if so, did you manage to find out it was with your application or device/software?

Let me know! I'd be really grateful.