Hi Sam. Just sharing log from a problem on this thread - https://discourse.osmc.tv/t/video-freezes-but-audio-is-normal/85687. Media info and sample file also on that other thread.
On 3.14 kernel screen shows still pictures every 15-20 seconds with audio running normally.
On 4.9 kernel, it buffers indefinitely. No audio. Only shows running time and OSMC logo animation.
This is the log - https://paste.osmc.tv/ehawaxalun