My understanding is that when there is a refusal-to-work process, while the investigation is being undertaken, the employee is not put on leave. That work stops until the investigation is completed.
Evidence of meeting #82 for Human Resources, Skills and Social Development and the Status of Persons with Disabilities in the 42nd Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was process.
A video is available from Parliament.