Web Shield problem

I do not know to the certainty if bug is one, but when you are making one download, if you to disactivate avast, download is interrupted.

I would think this should be normal as disactivating avast/webshield would cut the connection between the browser<->webshield and webshield<->server.

Exactly!

But it is when I am making download of some archive, and I disactivate avast, download is interrupted.

I’m curious, why do you want to disable avast! webshield in the first place?

Yes.
It does not matter what kind of file you are downloading, nor the filename has any importance. If the process you are connected with (WebShield) gets terminated, the download is terminated too. Not a great mystery though.