Do I need to apply for a new visa after leaving my job in Thailand and returning to work for a different company?

The user is currently on a Non-B visa with a one-year extension and plans to leave their job and travel out of Thailand for six weeks. They seek clarification on whether they need to apply for a new 90-day visa upon their return or if they could extend their current work permit and visa for a new job. A commenter advises that the user must cancel their current work permit and visa extension before leaving Thailand, as they cannot apply for an extension under a different employer using the current work permit.