When I scan my pixel 3 using webroot by clicking the "Scan for Viruses" button, I see a progress bar that says "scanning" very briefly and then it almost instantly goes to "Scan complete" with "no threats found". I have scanned many times before and this is unusual.
When I logon to the webroot site, I can see that it thinks my phone needs attention. It says the current scan is out of date.
I uninstalled/reinstalled and have the same issue.