Odd behaviour after upgrading to unraid 6.9.0

Hi All, 

I've recently upgraded to unraid 6.9 and have noticed some strange behaviour with it.

I upgraded today to 6.9.1 but the issue persists.

After some time running things will "stop working". (I know, super helpful)

To expand. Anything running will continue to run without issue. (Dockers, VMs etc). But from that random point in time, nothing further within unraid itself will work. 

Ie

- Cant Stop/Modify/Start dockers

- Mover stops working (error 126)

- command line things stop working (ie diagnostics - permission denied)

And the web ui starts behaving strangely

- Log window opens but is 'undefined' (see image)

- Info window doesn't open at all

- Can't download diagnostics

Rebooting unraid seems to resolve the issue. But the problem still returns seemingly at random.

I can still ssh into unraid and have attached a tail of syslogsyslog.txt.

I am not sure where to begin in trying to solve this problem.

None of the disks are reporting any errors, and I can log in and out again of the web ui.