Roku have confirmed that the crash was related to running out of memory
An update: The Plex Roku app development team is continuing to work on eliminating memory leaks and reducing memory usage. Changes made so far have now been released in the latest Preview Plex app - 7.0.25 - see release note:
Fix many memory leaks causing various crashes.
Work is continuing in addressing DVR Live TV specific memory issues - but the general fixes throughout the app in the preview release should have an impact
