Mac screen won't dim, mac won't go to sleep after VNC connection (ARDAgent)

I can't seem to figure this out. Have my mac configured to auto dim and sleep after 10 minutes. When I have used a VNC client to log on to my mac (via iphone or work PC) using different VNC clients the mac won't dim or sleep after 10 minutes.
After hours of trying to find the culprit it seems to be the process ARDAgent. When I force quit this process the mac will dim and sleep as usual. I tried different VNC clients but the problem seems to be on the mac end. Only a force quit or disabling screen sharing from the settings.app seem to help.
Anyone any idea how to fix this?

Hi,
same problem with my iMac ... I even did a clean install - it didn't help.
PLEASE APPLE FOLKS - FIX THIS !

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Try this:
How to Perform an Archive and Install
An Archive and Install will NOT erase your hard drive, but you must have sufficient free space for a second OS X installation which could be from 3-9 GBs depending upon the version of OS X and selected installation options. The free space requirement is over and above normal free space requirements which should be at least 6-10 GBs. Read all the linked references carefully before proceeding.
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Mac screen won't dim, mac won't go to sleep after VNC connection (ARDAgent)

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