Why am i getting new notification of my topic old replies

Describe your issue

sometimes when i open the community page, i receive a notification from an old topic where someone replied to me.

Actual Behaviour

the image below is the comment which is very old one. i am getting this reply as a new notification again and again. i don’t know why.

Topic link - Becoming a ProKoder or how to contribute to the community

6 posts were merged into an existing topic: Probable Bug in Notifications