Hello.
We do plan on replacing the Anti-tracking extension soon with a new extension called Privacy guard.
It was just announced in this post: https://forum.avast.com/?topic=319966.0
I do believe, that the issue will be resolved as soon as this extension is released. In the meanwhile, we will continue to investigate to find the real cause of this issue.
Thanks
For info, when I deactivated the Anti track extension, the windows log stopped with the warning message about "kmediagceboldddnnajkcochbkfkedel\1.23.0.675_0".... but moved to the "Hack Check" extension, "nmebbcjdbhgggcgohlnlgadkmjiedfbc\1.2.341_0" (idem stevec5375).
When deactivating it too the warning made its bed in Avast Performance Manager "mecokbmnofclapimmlnfegiohceoaocc\ 1.2.220".
I couldn't find where to disable this extension but if I could, chances are that a new message will blame another extension.
So, I don't feel that the problem is due to a particular extension, but I could be wrong.