I noticed that disabling and then re-enabling "Media & Apple Music" access on application's settings (one under Settings app) solves the problem (well - at least temporary).

We have MPMusicPlayerApplicationController.applicationQueuePlayer working with Catalyst, but user experience is awful. When Catalyst app calls any methods of a player, the Apple Music application launches in a background and while it is launching (takes several seconds on pretty powerful MacBook Pro with 8-core i9 CPU and 16Gb of RAM), Catalyst app is totally frozen with "rainbow wheel of death" shown... Maybe it is expected behavior from technical stand-point, but it is no way desirable from user experience stand point! Any comments, Apple? Thank you!