Volume up & down keys need to be pressed twice
After upgrading my Librem 13 v2 to the latest Coreboot version, the volume up and down keys need to be pressed twice to work.
My previous Coreboot version was 4.8.1-purism-3 (08/15/2018)
My current Coreboot version is 4.12-purism-4 (11/06/2020)