Recently commented not working?

Is there something wrong with the recently commented feature? I've started noticing that when I comment on an image it is not bumped on the list of recently commented images after that. It's not as if I'm mass commenting images, just make one comment once in a while. I could understand a flood protection when someone comments on 10 images within a short time, but this makes no sense to me, it feels like I'm shadow banned.

I don't think there is anything wrong with 'Recently commented'. I have been watching it after reading this and I think there is a threshold of 15 mins before images start showing up on 'Recently Commented'.

https://www.girlswithmuscle.com/comment/2643356/

When you post a comment, there is a delay.

This delay applies to everyone.