Model_host.exe block take 50% when open web pages

First, I’m an Avast user and not an Avast Team member.

Might be worth taking a look at this related topic.

Especially the later post by Avast Team member [prokopes] and Avast User [NON].
Requests for LOgs

Now I don’t know if that ticket number would be valid for additional report logs. However you could add your comments to that topic.