Yes, try to go back and test. Also can you create a new Logical Volume and new share before rolling back and test? I want to see if this is related to that share. Unless you have done this already.
I don't have any extra space to make another LV. I did have another thought that might be somehow causing the problem.
I recently reformatted and rebuilt our three RAID6 arrays into one huge VG. Before, we just had one LV for each RAID. I did this change and the update to 3.11 at the same time, so maybe the problem is the single VG across 3 RAIDs. Any chance that could be the problem? I hope not, because I've got about 4.5TB of data on it with no way of moving it off to another place to rebuild.
That could explain the issues, just to test roll back to previous version (please save all your settings and configs) to verify. After that we may need you to send in logs to support@open-e.com and enable the Remote Support function to see if we can take a deeper look into the Volume Group and RAIDs. But let's test then report back to us.