Thank you.

Is this a problem related to "Bracketed Paste"?
https://github.com/gdamore/tcell?tab=readme-ov-file#bracketed-paste

Does it work differently if I run EnablePage() first?

diff --git a/oviewer/oviewer.go b/oviewer/oviewer.go
index c079cec..d601654 100644
--- a/oviewer/oviewer.go
    b/oviewer/oviewer.go
@@ -686,6  686,7 @@ func (root *Root) prepareRun(ctx context.Context) error {
 	if !root.Config.DisableMouse {
 		root.Screen.EnableMouse(MouseFlags)
 	}
 	root.Screen.EnablePaste()
 
 	root.setCaption()
 

I also suspected bracketd paste, but disabling it in iTerm2 didn't change anything. In Terminal.app, I could not even find the setting. The issue was also reproduced in kitty and WezTerm.

By the patch, paste became slower, but the result was the same.

There was a case in which the middle part was lost. c6c0796d-4a67-40f5-8e47-eed8454200c2 became c7-40f5-8e47-eed8454200c2

Ummm. I don't know where the cause is yet.

Disabled incremental search and it is working well.

Incsearch: false

Thank you!

That's why an event will occur one character? !

Will it work correctly by canceling the incremental search when there is a pending event?

diff --git a/oviewer/search.go b/oviewer/search.go
index 7ba9f17..e463a4a 100644
--- a/oviewer/search.go
    b/oviewer/search.go
@@ -535,6  535,9 @@ func (root *Root) sendSearchMove(lineNum int) {
 
 // incrementalSearch performs incremental search by setting and input mode.
 func (root *Root) incrementalSearch(ctx context.Context) {
 	if root.Screen.HasPendingEvent() {
 		return
 	}
 	if !root.Config.Incsearch {
 		return
 	}

Thank you for investing. Now it's working perfectly 🎉

Thank you for reporting.
Fixed with #616.