iTunes syncronisation not working
iTunes has been acting weird lately. Songs/albums are not showing in the playlist and doesn't syncronise with my iPhone (MBP to iPhone). This goes for both ripped CD's and music bought from iTunes store, e.g. song titles are greyed out in the playlist and on iPhone.
For CD's the following seems to work; delete it from iTunes, rip the CD again and then synchronise.
For music from iTunes store; I've deleted it and re-downloaded it on my MBP, but this seems to only work for a few songs. I have to go through every song on my iPhone and download it. That's not going to happen.
Also, cover art has a rather erratic behaviour, showing, not showing, showing, etc.
Anyone has a clue what's going on with iTunes these days?
MBP 10.13.2 / iTunes 12.7.5.9
iPhone 5s 11.2.6