Local Files synced to ios are displaying/playing only half of the track length

[Skarnuli]

I am syncing some audiobook mp3 files to my Local Files to play on my Iphone. The track appear and play fine on the Windows client, but on my Iphone they only display and play roughly half of each track. For example Track 1 is 71:39 on my Windows computer in Spotify. When playing the same track synced to my Iphone it shows up as 32:39. (I have the latest ios & Spotify installed on all)
When I reach the end of each track it keeps playing but the time counter remains at 0:00. Is anyone else having this issue? Thanks!