I have same version same issue and still looking for a solution.
I have only working workaround.
If you can you should add another url address and amend your host file if you cannot clear .NET framework cache located in destinations shown below:
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root
or
C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root
provided that you are using .NET v 4.0 if not change it respectively.
That will clear all your pre-rendered pages so bear in mind that any website on that server will become sluggish for a while.
Edit:
I've found that logged in users are not showing because call to /api/sitecore/DomainAccessGuard/GetActiveSessions
results in 404.
I workaround it by adding rewrite rule
<rule name="Rewrite api">
<match url="^api/sitecore(.*)" />
<action type="Rewrite" url="sitecore/shell/{R:0}" />
</rule>
I am still trying to find the real culprit.