CentOS - Aug 2016 - CentOS 6 : TigerVNC auto disconnect in version 1.1.0-18

Hi,
When TigerVNC was updated from version 1.1.0-16.el6 to 1.1.0-18.el6, our VNC
client kept getting killed after connecting for about 180s. We had to downgrade
back to -16 to avoid this issue.
We have a setup which allows users to log into our system via a web browser,
with TigerVNC as the VNC server, noVNC as the client, and connecting via
Websockify. With the update of TigerVNC, the VNC client kept getting killed 180s
after logging in -- the user is returned to the login page. We are using CentOS
6.8.

We can't figure out what the problem might be -- the update seem to be
mostly changes related to x11-server - could this be somehow related? The timing
of the logout seems quite precise, as if it is triggered by some timer. Does
anyone have any idea what the problem might be?

Is this the best place to ask about this? The changes between -16 and -18 seem
specific to CentOS (I can't find them on the source at TigerVNC's
website), so I assume that is not the place to ask about this issue.


Kish Shen