I've synced my music to my iPhone 6S, almost 9000 tracks and every time I open the app it is so slow, I have to wait 10+ seconds after selecting any function for it to register. I think it's down to it wanting to check the sync status and download and newly added music.
It's been happening for months, not just the latest release. My server version is 1.80
Does anyone else have this issue ? Is it the sync ? Is it just parsing 9000 tracks every time I open the app ? Any ideas ?