Have Mastery Names of Others in Party [Client]

The name of my mastery pages in the drop down menu were copied from the name of the mastery pages of another player in the team builder lobby, specifically Stello111. They were also copied in the display of the selected mastery page. They were not copied in the hover popup.

1. Create a party teambuilder queue.
2. View the mastery pages on the profile of someone in the lobby.
3. Some or all of the names of their mastery pages will override yours.

This bug occured two of two times I tried to recreate it. I liked to a screenshot showing the disparity between the drop down and hover display.