First I don't know what you mean by Threats (a screenshot might help) ?
What were you doing at the time, if running a scan what scan was it (as this does make a difference) ?
Some scans, such as the Smart Scan, run multiple different scan and this makes a difference on what may be displayed. Some of these different scan could be a free (restricted) version of a component, say Cleanup for instance.
If the Smart Scan - I have been banging my head against a brick wall trying to get Avast to change this button, 'Resolve All' is an 'Action' phrase and the user doesn't want to resolve what they don't know.
If you actually do click Resolve All (from my prior testing) it does give more information, but nowhere as much detail I feel is needed/required. As you can see we need more information to try and give a detailed answer.