Grid type doesn't go lower than 1/4?

Hello, my grid type doesn’t go lower than 1/4 even if the quantize is set to 1/2 and the setting is set to “use quantize”. I always see the vertical lines correspond to 1/4 OR higher if the quantize settings is higher than 1/4. But never lower than that


Could you attach a screenshot, please? Are you talking about the Note Start or Note Length?