I tried same configuration with other distro and it works (also on manjaro that has similar installer, I guess).
I’m dual booting with Windows 10 in a different drive:
2 ssd
1 -> Single partition, Windows 10
1 -> 4 partitions:
- /boot ext4
- swap
- /home ext4
- / ext4
I disabled UEFI and my MBR is on the ssd with Linux