Avast sandbox alerts after enabling ISCA Alert Infocon proxy

Trying out the Infocon proxy, I found that avast sandbox started to flag programs I have for ages on my computer without being flagged, like Mailwasher and Chrome Privacy Guard, a privacy launcher for my GoogleChrome browser. What is this sandbox behavior, is it a bug or is it a feature?
By the way when I closed down the Infocon proxy there were no more alerts…

polonus