ZFS cache device by-id reverts to device name after reboot

[yurtesen]

I added a cache device:

zpool add rpool cache ata-MXXXX_BYYYYYY-part1

and I see the device ID in `zpool status` output at first. But after a reboot it reverts to device name

        cache
          sdi1                                              ONLINE       0     0     0

I tried to search this several times both in proxmox forum and on internet but did not manage to find much. What am I doing wrong?