Hello,

Thanks for your post.

Regarding this issue, if you create a simple winform project with
TabControl and several TabPages, does the problem still exist? Also, you
may test your project on another machine, does the problem still exist?
Also, is there any third party control on the tab? If you remove these
third party controls, will this problem be fixed?

With these tests, we can determine if this problem is project-specific or
machine-specific. If you can create a simple sample project to help us
reproduce out the problem, it will give us a better understanding. Thanks

Best regards,

Luke Zhang
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