I found an issue on alpha.jitsi.net. If you create a room and the lobby is enabled but the welcome screen is disabled then when a person joins the buttons are not spaced well and the virtual background option is missing. This is not the same on meet.jit.si.
Steps to reproduce:
- Start a meeting at alpha.jitsi.net
- Turn on the lobby
- Disable the pre meeting screen
- Join from another PC or browser. That user will get the below UI presented where the options are not spaced out and the virtual background option is missing.