Tracking loading and playing issues. Forever to load a Track

I downloaded your app from play store.
When i select i a track it takes forever to load the track, and if in case i am successful in loading the song, the track laggs. It plays in a reloop of every bar. it juz keep repeating like a 1 bar loop.
I have a asus zenfone 2, 4gb ram, 2.3 ghz processor, and this is a new phone and cuz off your app, my new phone which has only been 4 hours, got stuck and crashed.
Please help, i really like this app and i want this to work on my new phone.