Please, upgrade to version 7
to see if the issue persists. If you don't want to completely uninstall your version 6 you can do the following:
1. Download portable Viewer 7 and add one of your remote Hosts in the address book (the one that you have issues with).
2. Upgrade the Host to version 7.
3. Test this one connection to see if the issue persists. I recommend that you delete the Host log (html files) before you start a remote session to avoid possible confusion. Note that the time in the log is shown as UTC, not your local time.