Its probably been mentioned already but just in case it hasn’t…
The Live TV & DVR → Browse feature is not remembering the filter and sort order.
By default it comes up filtering “All Episodes by Airing” but I’m more interested in “All Movies by Airing” so I change it. I then navigate to another part of Plex and back to Live TV & DVR → Browse and its back to “All Episodes by Airing”. Whilst the selected “What’s On”, “Guide” or “Browse” tab is remembered by the app, the filter and sort isn’t 
By comparison Plex for Windows remembers my selection so its always at “All Movies by Airing” 
Additionally, any word on when/if the Live TV & DVR → DVR Schedule feature coming to the preview?