I'd recommend updating to the latest version, 8.0, as some fixes have been implemented that should have a positive effect on these types of issues: https://www.lansweeper.com/knowledgebase/updating-your-installation/
Bear in mind that if you have certain types of scanning set up, this could cause assets to be in the queue almost continuously. Especially performance scanning on a large amount of assets on a high interval. Just to be sure, have a look at your configured performance scanning targets under the Scanning\Performance Scanning menu.