Some hours ago I received an update on my Android Samsung A5 (2017) for the ROBLOX mobile app. I clicked the Menu so I could lower my Graphics, and on the Menu’s playerlist he had the same Username I did. I tried this on other games and from what I found out, the person on the top of the list gets your username. My friend, confirmed that it does not happen on the Desktop version, but on mobile.
Here is a Screenshot:
