Just encountered it on a 2019 MacBook Air. Was trying to figure out why the installer wouldn't boot -- had first tried to install Arch, have given up on that as too complex (had gotten to the point that the installation had a bootloader, but couldn't quite make it to a command line with the real installation), but at least the Arch installer ISO/usb would boot up more than half the time.
Kernel panic is a known issue, judging from comments on t2linux.org. Not sure what the next steps are, though.
Edit, added: OK, switched from the Manjaro-Gnome installer to the community-maintained Manjaro-Cinnamon installer, and at least the kernel did not panic.
Taking awhile to start up tho, FWIW. Various drivers not getting the responses they want.