test.webrtc.org Camera test always uses 1st camera despite 2nd camera is set in configuration

[tseeling]

Browsers and versions affected
Current Edge and current Firefox

Steps to reproduce
Have 2 cameras in your PC, e.g. builtin laptop camera and USB webcam.
Open browser to test.webrtc.org.
Open hamburger menu
choose 2nd camera
click "continue"
click "start"
webcam test fails, click on red "X"
Messages refer to 1st camera (which is still not selected in the hamburger menu)

Expected results
Camera test should use 2nd camera as chosen in the hamburger menu

Actual results