Button events inside split button do not fire when ClosePopupOnMouseDownDelay = 0

[TAlecksen]

I have a button within a Split Button that has an event to open a Window. Since I would like the Split Button menu to close immediately after clicking the button, I have set the delay to 0 as shown below. However, the event never fires. When I set the delay to 50, it sometimes fires, and when it is 100 or greater, it always fires.

<Fluent:SplitButton ClosePopupOnMouseDown="True" ClosePopupOnMouseDownDelay="0">
  <Grid>
    <Button Click="button_Click">   
        .......
    </Button>
  </Grid>
</Fluent:SplitButton>

---

Visual Studio 2022

• Fluent.Ribbon 11.0.0
• Windows 10
• .NET 7.0