Selection highlighting lost when focus leaves editor

[fooblahblah]

Describe the bug

When selecting text in the editor it is highlighted as blue as expected. However when the editor does not have focus, the highlighting is lost. The weirder part seems to be that the selection in the editor is still in effect, so using the call editor().getSelectedText() will return the previously, but not highlighted selection.

To Reproduce

Steps to reproduce the behavior:

1. Go to https://nhn.github.io/tui.editor/latest/tutorial-example01-editor-basic
2. Select some text in the editor
3. Simply click the preview on the right
4. Notice the selection highlight is lost

Expected behavior

Selection highlight is maintained even when focus is lost.

Desktop (please complete the following information):

• OS: Arch Linux
• Browser Chrome and Firefox
• Chrome version 130.0.6723.69 (Official Build) Arch Linux (64-bit)
• Firefox version 131.0.3 (64-bit)