No settings have changed, and I still get warnings about red light camera, vehicles on shoulder, etc, but for some reason Waze stopped warning about speed cameras.
When I zoom in on where the speed camera is, it shows a little camera icon, but no verbal or visual warning.
Perhaps your preferences were changed accidentally or by a software update?
You said red light warnings were working, so the volume settings in the app should not be the issue.
Also, you will only get warnings in the direction of travel that is being monitored by the camera. If the camera is monitoring the other direction, you won’t get warned. Cameras in Ontario are configured to capture the rear plate of offending vehicles after they pass the camera housing.
It’s also possible that there’s an issue with the files for the voice you’re using. Try changing to another voice and then back again after a while to force a redownload of those files.