Avast premium security bloquea algunas url que no tienen contenido malicioso

Algunas webs son bloqueadas por el escudo web de avast. Dice que tienen software malicioso, pero he comprobado que no es así en barios casos. Por qué Avast no distingue entre las webs de la lista negra?

First I don’t work for Avast.
Without details it isn’t going to be possible to say why.

You can report it - Possible False Positive - New location to report both a False Positive and or a False Negative (for File or URL) - Choose Your Sample Submission Type | Avast

You can also check said site/s against other sources:
There are sites that can also check a site link and or file upload.