Will Immigration question my cancellation of a Non B Visa if I apply for a Tourist Visa in Thailand?

The user is considering canceling their Non-B Visa due to issues with their employer and wants to apply for a Tourist Visa instead. They are concerned that Immigration might question their change from a Non-B Visa to a Tourist Visa. Community members suggest that it's usually not necessary to cancel the Non-B Visa if it is used to enter Thailand before its expiration, and that visas typically cannot be canceled as a common practice.