iTunes cutting off songs - my fix
This has been frustrating me to no end. It only recently started happening and I followed some the of the suggested fixes to no avail. This simple little fix worked for me however:
When one opens the Get Info window on an album, or by selecting a list of songs, there is a check box for "use work and movement". Untick that! No idea what it's for, but that seemed to fix it.
Hope it helps anyone else out there.
iPhone X, iOS 11.2.6