For Dolby Vision we have no choice but to disable refresh rate and resolution switching and rely on the mode you have set. Sadly the Android API’s don’t offer away for us to tell which mode supports Dolby Vision and which doesn’t.
In order to use Dolby Vision inside of Plex on the SHIELD 2019, you need too head into the Android settings on the SHIELD, then Display settings and select a mode that is Dolby Vision Ready (it can be Dolby Vision and HDR10 Ready). You can keep the refresh rate or / and resolution switching enabled inside of Plex, and we will switch to your original mode (or leave the mode untouched) when Dolby Vision content is played.
