I updated to the CoreELEC 21 5/22 nightly with the Kodi upstream Atmos audio dropout fix, and tested Black Hawk Down. It appears indeed this fix is legit. No audio skips or dropouts. Interestingly instead of that it’s showing 8 a/v corrections in about 20 minutes of Play time…
So you may want to consider the 5/22 nightly instead. As the Atmos fix is definitely worthwhile.