Count in Discussion tab from a Merge Request increases when a commit is pushed. But on refreshing the page, it goes back to correct count

Summary

Discussion count gets updated by the changes I push to the merge request

Steps to reproduce

1. Create a merge request from a branch to another. Let's say from develop to master
2. Go to the merge request page as you need to observe the count from Discussion tab
3. As you haven't added any comments on MR / on the code, the count will be 0
4. Now push a commit to develop branch and check the merge request page. Do not refresh it yet
5. Observe it for some time. You will see the Count in Discussion tab will get updated to 1
6. Refresh the page and the count will be 0

What is the current bug behavior?

If I am not mistaken, count in Discussion tab from a merge request is for number of discussions on the Merge request only. And it shouldn't increase temporarily by changes I push to that repo.

What is the expected correct behavior?

Discussion count should not update by changes I push to the repo.

Output of checks

I am using GitLab Community Edition 10.6.4. Gitlab.com