Since the update to the Chromecast app yesterday, "Play Version" is no longer honored at all, even when controlling chromecast from a web browser.
If I have multiple versions of the same media, I get the "Play Version" selection screen both on android and plex web. When playing back directly in the web browser, it will play the version I choose. However when casting to Chromecast, my selection is ignored, and the version is auto-picked.
"Play Version" has been ignored on the Android client for over a year now (see http://forums.plex.tv/discussion/241089/play-version-bug#latest), but now it has spread to the web player.
PMS version: 188.8.131.5241
Android app version: 184.108.40.2068 (c5c6871a)
Chromecast Ultra: System firmware version: 100555
Chromecast Ultra: Cast firmware version: 1.28.100555