I have lost the ability to 'cast' or 'play to rasplex' from my media manager associated with PMS (9.9.10 and previous version) on laptop. Although the option appears under the thumbnail, selecting it does not invoke any activity on the rasplex. This occurs for all release candidates so far (RC3 at the moment). Rolling back to 9.9.20 fixes the issue.
Not sure if its related but I also have the issue of disappearing image/continuing audio thats associated with casting from android device.
Plex web client as well as plex ios app both do not play media on the rasplex. I have the same problem. Does plex do any testing on other devices before releasing an update?