Recently (maybe in the past two weeks or so), Spotify has begun to flicker/strobe erratically with my G-Sync monitor. The effect is very disorienting and the result is that I've developed a displeasure to go and change songs and try to open Spotify as little as possible.
I'm not sure who the burden of fixing this is on, Spotify or Nvidia, but I'm mentioning it here also, and to see if anyone else has had the issue. If I disable hardware acceleration in Spotify, it's resolved. However, then there is no acceleration, so the interface does not animate as nicely and, as I read, the acceleration setting also governs hardware sound processing.
I can also resolve the issue by disabling GSync globally in the Nvidia control panel (which is no solution). I then tried to add Spotify's .exe to the CP and make some application-specific settings... I can disable Gsync there, for Spotify only, and it seems to work but also has the effect of causing my monitor to fail to reliably activate Gsync in any other program while Spotify is running.
Oddly enough, after all of this swapping back and forth and ultimately changing the settings back to where they started (hardware acceleration in Spotify on, Gsync on globally, and leaving the Spotify .exe settings as global settings), it is behaving for the moment. The only difference is that I now have the executable listed in the appliction-specific settings list.
I don't expect it to continue to function correctly. It seemed that this problem began intermittently like this, with it only flickering seldomly, until arriving at the point it was before I came here, where it was always present. Has anyone else had this issue? I believe that both Spotify and Nvidia's drivers were updated within this timeframe, so it's not clear which caused it.