HubiC mount not working

Since a few days, I have problems mounting HubiC, tested also with v1.36-137-ga2e3af05β.

HubiC is mounted with no error with the command
# rclone mount hubic: /media/.hubic/

If I list the root dir of the mount, it’s listed correctly, while if I try to go in the “default” subdir I get a “Input/ouput error”:
# ls .hubic/default
ls: reading directory ‘.hubic/default’: Input/output error

Here is the debug info:

# rclone -vv mount hubic: /media/.hubic/                                                        
2017/05/29 00:10:13 DEBUG : rclone: Version "v1.36-137-ga2e3af05β" starting with parameters ["rclone" "-vv" "mount" "hubic:" "/media/.hubic/"]
2017/05/29 00:10:16 DEBUG : Hubic: Got swift credentials (expiry 2017-05-29 01:20:26 +0200 CEST in 1h10m9.529304788s)
2017/05/29 00:10:16 INFO  : Hubic Swift container : Modify window is 1ns
2017/05/29 00:10:16 DEBUG : Hubic Swift container : Mounting on "/media/.hubic/"
2017/05/29 00:10:16 DEBUG : : Root: 
2017/05/29 00:10:16 DEBUG : : >Root: node=/, err=<nil>
2017/05/29 00:10:22 DEBUG : /: Lookup: name="default"
2017/05/29 00:10:22 DEBUG : /: >Lookup: node=default/, err=<nil>
2017/05/29 00:10:22 DEBUG : default/: Attr: 
2017/05/29 00:10:22 DEBUG : default/: >Attr: attr=valid=1m0s ino=0 size=0 mode=drwxr-xr-x, err=<nil>
2017/05/29 00:10:22 DEBUG : default/: ReadDirAll: 
2017/05/29 00:10:22 DEBUG : default: Dir.ReadDirAll error: can only list from root
2017/05/29 00:10:22 DEBUG : default/: >ReadDirAll: item=-1, err=can only list from root
2017/05/29 00:10:28 DEBUG : /: Attr: 
2017/05/29 00:10:28 DEBUG : /: >Attr: attr=valid=1m0s ino=0 size=0 mode=drwxr-xr-x, err=<nil>
2017/05/29 00:10:28 DEBUG : rclone: Version "v1.36-137-ga2e3af05β" finishing with parameters ["rclone" "-vv" "mount" "hubic:" "/media/.hubic/"]

Has someone any advice?

Thanks.

What’s more strange is that if I mount a crypted folder (i.e. hubic:default/CryptedData) all encrypted subdirs work without problem.