My company had been using Teamwork for years and recently migrated to ClickUp. One of the things I miss from Teamwork was the ability to a) pause time and b) have multiple time clocks available at once. In Teamwork, if you start tracking time on a new task, whatever time clock you were using immediately before is automatically paused.

In ClickUp, there is no pause. Only stop. That makes it difficult for those of us who have to switch tasks multiple times during the day to deal with little fires.