Wrong display of the player's activity time in a Realm

Usually, when I go check the players activity, I just put my cursor on the little colored lines and it shows directly when and how much each player had played.

However, since the last update, when I put my cursor on the time line of a player it shows the time, but by bloc of 1 minute. For example: if player has played 3 minutes, between 7h00 and 7h03, it will show:
(19:00 - 19:01) 1 minute
(19:01 - 19:02) 1 minute
(19:02 - 19:03) 1 minute

instead of:
(19:00 - 19:03) 3 minutes

Steps to Reproduce:
1. Click on the "Minecrat Realm" button in the menu
2. Click on the white square "Configure Realm" in the left corner
3. Click on the "Players" button
4. Click on the "Player activity" button
5. Put your cursor on one of the colored lines assigned to each player

That's it!