Stutter playing 60fps 10-bit HEVC videos on Streaming Stick +
I am having trouble with stuttering video streamed from a Plex DLNA server to the Roku Media Player app (v4.2 build 1657) on my Streaming Stick + (3810EU v9.3.0 build 4172-50). Any & all assistance appreciated.
The problem only seems to affect the specific combination of HEVC + 10-bit + 60fps. It affects videos of different resolutions provided they share these properties.
None of the files are HDR (specifically, all the main10 files use the bt709 colour space).
Plex transcodes the stuttering file to H264 by default, but by editing the RokuDLNA-4400X-7.x.xml profile in the Plex Server folder I was able to force it to play via direct stream - which I confirmed using the Plex dashboard. This is when the stutter appears.
This problem also manifests in exactly the same way playing the files using the Plex app for Roku (that's how I first noticed it). In that case the app makes no attempt to transcode, presumably expecting to be able to play the file directly.
The Streaming Stick + should be able to play 4K60Hz HDR. Is there any reason why these files wouldn't play properly?