Hello, with the latest avast update, so far the HTTPS scanning is working great!!! on my windows xp service pack 3
computer.
glad to hear that 
Not on mine, the topics/post I have created on this previously has not changed.
Even after the so called regular 2016 release I still get problems browsing https sites, the avast forums and uk.yahoo.com being high up there as these two are my most active https browsing.
Pages stop loading and it requires disabling https, stopping the web shield. Trying to refresh the pages doesn’t have any effect until I go back in and enable https scanning and start the web shield.
This is a pain and has been going on from 10.4.xxxx beta testing right through to 2016 release.