Jiaqi Liu

I have not seen that, are you using any third-party IME?

It's more like a Windows issue to me. I will keep it in mind to see if I can figure out the reason here.

Can you provide test case? Or do a screen capture?

是的，这个是WinRT RichEdit的bug。系统问题。。 @be5invis

It seems like a system bug, does it persists after rebooting?

你俩用的什么输入法？

> WIN10 17763.2452 也有同样的问题，复制时会卡住几秒，如果复制完马上切屏，那么会在几秒后弹出原复制窗口，此时才算复制成功，粘贴能得到正常的内容，否则如果复制完马上切换窗口粘贴，得到的还是之前复制的内容， 输入法测试了微软拼音与搜狗 试试关闭系统自带的杀毒软件？

> 这都行？。。。。

This is a known issue, and it comes with the original winrt rich eidt control. I have tried to fix it but no luck yet...

I will wait for WinUI 2.x to get mature before implementing it and update Notepads' visual. Also the Windows 11 adoption rate is too low at this point.