ZFS CT content empty but only from host

[greg]

Greetings
I have a CT running for years on ZFS.
This morning, listing the CT content from the host is empty, but the CT is running fine and from the CT I can see all the files...

From inside the CT:

# ll /                                                 
total 389                                                                        
drwxr-xr-x 2 root root 119 2021-12-30 15:45:39 bin/                       
drwxr-xr-x 2 root root 2 2018-06-26 14:03:08 boot/                      
drwxr-xr-x 6 root root 480 2020-12-31 15:45:05 dev/                       
drwxr-xr-x 103 root root 200 2022-02-23 14:42:04 etc/                       
drwxr-xr-x 2 root root 2 2018-06-26 14:03:08 home/                      
drwxr-xr-x 11 root root 12 2021-12-30 15:40:54 lib/                       
drwxr-xr-x 2 root root 3 2021-12-30 15:41:45 lib64/                     
drwxr-xr-x 2 root root 2 2018-09-07 09:09:05 media/
...

For the host:

# ll /rpool/ct/subvol-134-disk-0/
total 0

# df -h /rpool/ct/subvol-134-disk-0/
Filesystem                  Size  Used Avail Use% Mounted on
rpool/ct/subvol-134-disk-0  784G  128K  784G   1% /rpool/ct/subvol-134-disk-0

# zfs get mountpoint rpool/ct/subvol-134-disk-0
NAME                        PROPERTY    VALUE                        SOURCE
rpool/ct/subvol-134-disk-0  mountpoint  /rpool/ct/subvol-134-disk-0  default

# zfs get mounted rpool/ct/subvol-134-disk-0    
NAME                        PROPERTY  VALUE    SOURCE
rpool/ct/subvol-134-disk-0  mounted   yes      -

# zfs list -t all -o space -r rpool/ct/subvol-134-disk-0    
NAME                        AVAIL   USED  USEDSNAP  USEDDS  USEDREFRESERV  USEDCHILD
rpool/ct/subvol-134-disk-0   129G   879G      608G    271G             0B         0B

(also all the snapshots are listed here)

The even weirder thing is, the .zfs folder is missing:

# ll /rpool/ct/subvol-134-disk-0/.zfs/snapshot    
ls: cannot access '/rpool/ct/subvol-134-disk-0/.zfs/snapshot': No such file or directory

It feels like something empty has been mounted over the mountpoint.

It seems that it happend about the time a replication was made, since the last snapshot is a replication one:

rpool/ct/subvol-134-disk-0@__replicate_134-0_1645700520__  creation              Thu Feb 24 12:02 2022

Maybe I should rollback to the snapshot just before this one?

This is a production server and it needs to be running tonigh for an operation, so I'm relunctant to try and reboot it...

Can someone help me???

Thanks in advance

Regards