Cannot remove directory on btrfs

There is an object on btrfs file system called "????????? ??????" which probably some improperly deleted or copied temporary file or directory. And which can't be removed with common commands: rm, rm -d:

[root@localhost sessions]# rm -d \?\?\?\?\?\?\?\?\?\ \?\?\?\?\?\?/
rm: cannot remove ‘????????? ??????/’: Directory not empty
[root@localhost sessions]# rm -dr \?\?\?\?\?\?\?\?\?\ \?\?\?\?\?\?/
rm: descend into directory ‘????????? ??????/’? y
rm: remove directory ‘????????? ??????/’? y
rm: cannot remove ‘????????? ??????/’: No such file or directory
[root@localhost sessions]# rm \?\?\?\?\?\?\?\?\?\ \?\?\?\?\?\?/
rm: cannot remove ‘????????? ??????/’: Is a directory
[root@localhost sessions]# file \?\?\?\?\?\?\?\?\?\ \?\?\?\?\?\?/
????????? ??????/: directory

How such objects should be deleted?

UPDATE: OS and shell:

Linux 4.0.4-2-ARCH #1 SMP PREEMPT Fri May 22 03:19:32 UTC 2015 i686 GNU/Linux

GNU bash, version 4.3.39(1)-release (i686-pc-linux-gnu)

UPDATE2:

[root@localhost sessions]# rm -fr \?\?\?\?\?\?\?\?\?\ \?\?\?\?\?\?/
[root@localhost sessions]# ls
????????? ??????   backup-9.session
[root@localhost sessions]# lsattr \?\?\?\?\?\?\?\?\?\ \?\?\?\?\?\?/
[root@localhost sessions]# 

UPDATE3:

[root@localhost sessions]# echo $LANG
en_US.UTF-8
[root@localhost sessions]# locale
LANG=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=

UPDATE4:

[root@localhost sessions]# ls -la
ls: ????????? ??????: No such file or directory
total 23760
drwxr-xr-x 1 al users       0 Aug 13  2014 ????????? ??????
drwxr-xr-x 1 al users       0 Jun  7 05:53 .
drwx------ 1 al users       0 Jun  8 05:06 ..
-rw-r--r-- 1 al users  274557 May 24 18:58 backup-11.session

UPDATE5:

[root@localhost sessions]# find . -exec rm -fr {} \;
rm: refusing to remove ‘.’ or ‘..’ directory: skipping ‘.’
[root@localhost sessions]# ls -la
ls: ????????? ??????: No such file or directory
total 0
drwxr-xr-x 1 al users 0 Aug 13  2014 ????????? ??????
drwxr-xr-x 1 al users 0 Jun  8 17:03 .
drwx------ 1 al users 0 Jun  8 05:06 ..
[root@localhost sessions]#