If you configure in Musescore 3 that chords are not to be played (just annotated), when the same score is reproduced in Musescore 4, this will not be obeyed, you must reconfigure again to mute them.

Example: In Musescore 3, create a simple melody for piano, Add some chords annotation. Configure the chords not to be automatically reproduced. Save and reopen in Musescore 4. The chords will be played, not obeying to the original configuration.