Reproduced it with seabios-bin-1.16.0-3.module+el8.8.0+16781+9f4724c2.noarch, boot a guest with 1 virio-scsi disk and 10 virio-blk disks, hitting "No bootable device".
Tested with seabios-bin-1.16.0-4.module+el8.8.0+19627+2d14cb21.noarch, not hit this issue.
1. boot a guest with 1 virio-scsi disk and 10 virio-blk disks, the guest boot successfully.
2. boot a guest with 1 virio-scsi disk and 16 virio-blk disks, the guest boot successfully.
And run seabios test loop, no new bug was found. So set status to VERIFIED.
Versions:
kernel-4.18.0-477.23.1.el8_8.x86_64
qemu-kvm-6.2.0-32.module+el8.8.0+18361+9f407f6e
seabios-bin-1.16.0-4.module+el8.8.0+19627+2d14cb21.noarch