iOS Music app skips songs / converting error?

The music app on my iPhone 7 (iOS 14.6) skips songs in a weird way. At some seemingly random point in the song, the next song starts playing. But the song being displayed as playing is still the one that is supposed to play. When the runtime of the first song ends, the premature song continues playing and the songhead jumps to the corresponding position of that song.

For example: Song A is 5:33 min long and plays fine until 4:16. Then Song B starts from its beginning, with Song A still being shown to be playing normally. The following 1:16 minutes Song B continues, after which the display switches to Song B, the audio continuing seamlessly, the playhead jumping to minute 1:16. Song B continues to play until its end – if it does not have the same issue and skips as well.

The skip happens always at the same position for a song. The problem is reproduced when I drag the playhead past the point where it skips in Song A. I.e. if I drag the playhead to 4:26, Song B start playing for the remainder 1:06 min. That means I cannot listen to the end of the affected songs.

The song in question was downloaded from Bandcamp. Songs are not set to fade and there is no stopp setting in place. The song plays fine on my desktop Music app and on VLC on iPhone.

My Music library on my MacBook (11.2.3.) is based on an iTunes library and stored on an external hard disk.

I have just removed all my music from the iPhone and synced it from scratch. I think it fixed some songs, but the problem is still there.

How can I get rid of this annoying issue? Is it a problem with the converting of the songs? I have set them to be converted to 192kBit/s.