When I run the test multiple times so Chrome instances do not close due to which PC utilization tends to 100%. So, I have to end Chrome instances manually. There might be so
Another solution that has worked for everybody in our company was removing "--no-sandbox"
argument from config file from the line that looked like this
chromeOptionsArgs = ["incognito", "--window-size=1920,1080", "disable-extensions", "start-maximized", "--no-sandbox", "--test-type=browser"];
By default protractor closes chrome instances after test execution unless the test fails in an irreconcilable way. So try to reset your protractor.conf.js settings back to default