The android app is being discussed on this forum thread. The problems with custom libraries are discussed towards the bottom of Page 2 and continue on page 3. Note that I have no issue at all with the layout of the new app. My problem is that I can only access one "other video library". My second library is not shown at all. However, if I search for a video by name, it shows up in the search results and it does play.
The v7.0.4 android app does not resolve this issue. V6.xx works fine.
https://forums.plex.tv/discussion/322412/plex-changed-do-not-update-plex-app-on-android/p3
There are reports that the ios app is having similar issues:
https://forums.plex.tv/discussion/324033/missing-library-on-latest-plex-app forum.
An unrelated problem is that the Samsung tv app can no longer delete files, after the recent Plex server update. I now have to periodically go through the "recently watched" list per library to delete content that was watched on the tv. This is being discussed here.
https://forums.plex.tv/discussion/321955/unable-to-delete-media-when-using-samsung-tv-plex-app
It would be great if you have access to the people who can resolve these issues