In all the various bootloader configs that lorax writes to installer images on different arches, it passes 'rescue' to trigger anaconda rescue mode. Only since anaconda-34.24-1.fc34 that doesn't work any more. anaconda now requires the 'inst.' prefix for all arguments it handles, so it needs to be 'inst.rescue'.

I've sent a PR to fix this - https://github.com/weldr/lorax/pull/1113 . I'm filing a bug so I can link it from openQA, and also to propose it as a blocker per Beta criterion "The rescue mode of the installer must start successfully and be able to detect and mount any installation performed according to the applicable criteria, and provide a shell with access to utilities capable of performing typical recovery operations." - it doesn't "start successfully" when accessed as usual. https://fedoraproject.org/wiki/Fedora_34_Beta_Release_Criteria#Rescue_mode