The issue was that the range for the time offset operator was so large, that the 0.1 increment seemingly had no effect. The solution is to add functionality to the slider to specify the increment step. Since the time offset operator deals in frames it made sense to snap to whole numbers. Also fixes #132187 For that the increment step has been chosen to allow for 10 steps in the slider range. Pull Request: https://projects.blender.org/blender/blender/pulls/132554