Comment 7 for bug 1574934

Workaround that works for me is mounting NAS through /etc/fstab (or just mount -t cifs <servername> <username> ...).
https://ubuntuforums.org/showthread.php?t=2309866
https://wiki.ubuntu.com/MountWindowsSharesPermanently

PS: I had a problem with write access to the mount point with my special credentials. It was solved by using guest user:
//servername/sharename /media/windowsshare cifs guest,uid=1000,iocharset=utf8 0 0
It is strange because such permissions are set for this share: read/write for everyone.