Unusual issue here. Using latest 5.6 beta along with Techdemo III.
When attempting to play (stream) FLAC files from the client, files transcode and start downloading fine, however playback doesn't start until nearly the entire file is downloaded; and when it does start, the position starts halfway on the file, almost like the client thinks it's been playing all along since early buffering.
I'm able to slide the position back to 00:00 and it does correctly start at the beginning. I've been able to duplicate this behavior multiple times as I mostly ripped my personal library straight from cd to flac.