textarea: sometimes freezes when calling textarea.SetValue() and then textarea.View()

My Update func shows or hides the textarea depending on app state. Sometimes it works well, but sometimes it hangs on View. Replacing `textarea.View` with some simple string works well, so the state is correct.

- OS: macOS
- Terminal: warp.dev

1. Install and run https://github.com/plutov/ultrafocus
2. Select "blacklist" from the menu

**Source Code**
Model Update: https://github.com/plutov/ultrafocus/blob/main/cli/model.go#L63
textarea.View: https://github.com/plutov/ultrafocus/blob/main/cli/view.go#L40

**Expected behavior**
Textarea shows/hides properly based on app state.

p.s.
When I remove SetValue() call everything works fine with empty textarea.