According to mesa, this bug was fixed in version 20.2.0. I'm not so familiar with Manjaro but with Ubuntu-based distros you may need to use an external ppa to get the latest version.
Works fine for me with an AMD R9 290 on Linux Mint 19.3, even with different mesa versions.
However, change over to Ubuntu 20.04 or Linux Mint 20 and I always get the dreaded zombie process with Automatic or OpenGL output. Changing output to X11 works OK.