Further to the two bugs I can see listed here and here, I gather the subtitle library in the updated Early Access Xbox app has been updated/rewritten as I have noticed an issue with subtitle timings.
Due to my server not being powerful enough to transcode Hi10P or H.265 content at 1080p, I have my subtitle setting set to “Only Image Formats” to avoid burning in of ASS/SSA styled subtitles. The release version of the Xbox player handles these relatively well (there are some issues there I believe related to scaling but beyond the scope of this post) and the subtitles are styled and timed accurately. However, when using the Xbox One app in Early Access, the timing of subtitles is off by a considerable margin, often preceeding the audio or lagging the audio by a full second or more.
I would like to continue testing the Early Access version of the app but for now have had to switch back to the Release version as watching anything with subtitles is impossible.
