ID3v2.4 has its own spec-defined way of storing multi value tags and the usage of custom characters like ; or , are non-standard behaviors. To enable split by those non-standard characters you need to explicitly enable it in the library options.
Thank you for your response – I have looked at it. I am in the process of updating my music library. I will get back to you whether it succeeds or if I need your help again.
mvh. Gert
Hello again - I have tried to do as you suggested - no effect.
I write genre as the following example: Brazilian, Jazz, Bossa Nova
Is that what makes it end wrong?
Kind regards GertS