Caching error while opening a newly created file with vofs

[zonia3000]

Hi,
when I try to open a newly created file I receive a "device or resource busy" error:

/tmp/vospace/mydir$ echo 'test' > foo.txt
/tmp/vospace/mydir$ cat foo.txt 
test
cat: foo.txt: Device or resource busy

Looking at the logs it seems to be related to a cache issue:

DEBUG 2021-04-28 17:36:27,864 139731148973824 vos-3.2rc1 vofs.flush.665 flushing 139731531997072
ERROR 2021-04-28 17:36:27,865 139731148973824 vos-3.2rc1 logExceptions.wrapper.20 Exception throw: <type 'exceptions.OSError'> [Errno 16] File refcount indicates files handle busy.
ERROR 2021-04-28 17:36:27,865 139731148973824 vos-3.2rc1 logExceptions.wrapper.21 Traceback (most recent call last):
  File "/home/sonia/.local/lib/python2.7/site-packages/vos-3.2rc1-py2.7.egg/vos/logExceptions.py", line 17, in wrapper
    return func(*args, **kwds)
  File "/home/sonia/.local/lib/python2.7/site-packages/vofs-3.1a0-py2.7.egg/vofs/vofs.py", line 669, in flush
    fh.cache_file_handle.flush()
  File "/home/sonia/.local/lib/python2.7/site-packages/vofs-3.1a0-py2.7.egg/vofs/CadcCache.py", line 933, in flush
    "File refcount indicates files handle busy.")
OSError: [Errno 16] File refcount indicates files handle busy.

Any idea about what could cause it?

Thank you!