% never changes in Full Scan

Greetings from the GREAT Country of Texas,

My Full System Scan never changes the % completed as a scan is running with ‘User Interface’ open nor when the small window is open in the lower right-hand corner of the screen. This has been going on for several updates and have always figured it would be corrected the next update, it has NOT.

Your signature say you have this Avast! 2015.10.4.2233

If that is correct, latest version is here https://forum.avast.com/index.php?topic=178580.0