QSFS mounted not working as expected

[mhost39]

using terraform i deployed a vm with QSFS volume
and ssh to vm and got the mount point

and this is the usage and available before write any think in /qsfs

then i tried to write on /qsfs

and when check usage and available i found that /root usage and available that changed not /qsfs

[maxux]

Please show output of cat /proc/mounts
Please provide output of df -i aswell.

Assumption that echo to the filesystem changed the root and not qsfs because size changed doesn't prove anything. Could be changed any log line or anything else writing in the same time.

For me it's normal that Used stay at 1 with a so small change in the filesystem. With df -i you will see the inode increasing.