### Describe the bug ComboBox appears to be throttled; I have to wait 0.5 seconds before I can open/close it again. https://github.com/user-attachments/assets/d48a9e1e-a937-435f-815c-ae5e121c95c8 ### Steps to reproduce the bug / ### Expected behavior _No response_ ### Screenshots _No response_ ### NuGet package version HandyControl 3.5.1 ### IDE Visual Studio 2022 ### Framework type .Net 9.0 ### Windows version Windows 11 (22000) ### Additional context _No response_