Duplication of the merge request in activity after approved

Hello there. We have GitLab Community Edition [13.3.2] and after updating to this version from old one we find some bug or smth.
New functionality - approving of merge requests. When someone do merger request and then somebody approved it - in activity you have two identical records:
@user1
Openedmerge request “test Iss54”
@user2
Openedmerge request “test Iss54”

And I’m trying to figure out, is this a bug? or are we doing something wrong.