In Soundcloud the marker indicating the lenght of the track / mix is not visible in Brave:
Open https://soundcloud.com/stream to see the issue. On the lower right side of the audio visualisation you can ususally see the lenght of the track. In brave its hidden. Might be a CSS issue?
1: Showing length of track (Screenshot from Safari)
2: Not showing length of track (Screenshot from Brave)
Show Indicator / Length of track