hylafax+ was running properly since years, however, after upgrade to Leap 15.3
its broken.
Started all over with a new installation, and while running faxsetup I get the
message:
/usr/bin/ln: Die harte Verkn���pfung '/var/spool/hylafax/etc/setup.modem' =>
'/etc/hylafax/setup.modem' konnte nicht angelegt werden: Ung���ltiger Link ���ber
Ger���tegrenzen hinweg
/usr/bin/ln: Die harte Verkn���pfung '/var/spool/hylafax/etc/setup.cache' =>
'/etc/hylafax/setup.cache' konnte nicht angelegt werden: Ung���ltiger Link ���ber
Ger���tegrenzen hinweg

(Translation: Hard link ... could not be created - invalid link across device
borders)

Disk layout is standard:

southpole:/home/axel # more /etc/fstab
UUID=c8fb8c4a-8c3c-4225-9742-450573aac089  swap                     swap  
defaults                        0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /                        btrfs 
defaults                        0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /boot/grub2/i386-pc      btrfs 
subvol=@/boot/grub2/i386-pc     0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /boot/grub2/x86_64-efi   btrfs 
subvol=@/boot/grub2/x86_64-efi  0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /opt                     btrfs 
subvol=@/opt                    0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /srv                     btrfs 
subvol=@/srv                    0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /tmp                     btrfs 
subvol=@/tmp                    0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /usr/local               btrfs 
subvol=@/usr/local              0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /var/cache               btrfs 
subvol=@/var/cache              0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /var/crash               btrfs 
subvol=@/var/crash              0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /var/lib/libvirt/images  btrfs 
subvol=@/var/lib/libvirt/images  0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /var/lib/machines        btrfs 
subvol=@/var/lib/machines       0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /var/lib/mailman         btrfs 
subvol=@/var/lib/mailman        0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /var/lib/mariadb         btrfs 
subvol=@/var/lib/mariadb        0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /var/lib/mysql           btrfs 
subvol=@/var/lib/mysql          0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /var/lib/named           btrfs 
subvol=@/var/lib/named          0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /var/lib/pgsql           btrfs 
subvol=@/var/lib/pgsql          0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /var/log                 btrfs 
subvol=@/var/log                0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /var/opt                 btrfs 
subvol=@/var/opt                0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /var/spool               btrfs 
subvol=@/var/spool              0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /var/tmp                 btrfs 
subvol=@/var/tmp                0  0
UUID=b05f8473-3b49-4724-88e3-b75f0f069cac  /.snapshots              btrfs 
subvol=@/.snapshots             0  0
UUID=50F1-50BB                             /boot/efi                vfat  
umask=0002,utf8=true            0  0
UUID=a72b88fc-ea8f-42b4-87f4-369848842cdd  /daten                   xfs   
defaults                        0  0
UUID=66b30a37-0630-41ad-ae6a-6f6e042e530f  /home                    xfs   
defaults                        0  0
# /dev/system/daten    /daten               ext4       defaults              1
2
# /dev/system/home     /home                ext4       defaults              1
2

Something seems to be treated different in SLE vs. Leap...