解決済み
このトピックへの返信は締め切られました。
In your LrC, the /preferences/Display/, what is shown?
I do not have your issue, and my /Preferences/Display/ shows this:

I ask this because of searching the community, yields this:
Additional searching in the community yields the following:
And indicates a reset of the preference file may be required.
I see that you are new to the community, so I have no idea on your experience. So a pair of links on resetting the preferences (read carefully). A buggy preferences file can lead to all sorts of buggy LrC behavior.
- https://helpx.adobe.com/lightroom-classic/help/reset-preferences.html
- https://www.lightroomqueen.com/how-do-i-reset-lightrooms-preferences/
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.
