Pretty much after every action on the team server, another line is added telling a tag is tag is created. This makes the overview and the ability to see all changes to the app quite a mess. What is the reason a tag is created each time? It’s quite annoying. Due to privacy reasons, most data is blurred.
I think this question could be best directed to Mendix, maybe create a support ticket for this.
As to why the line is created; I think it just shows all the activities. Creating a tag or branche line is just one of them.
A filter on these activities might be a good option, you could create an idea on the idea forum for it.