For those who use the new OBS Studio, stream on 'Game Capture' mode, and wish to display Overwolf overlay in their stream, please follow these steps:

  1. Open OBS Studio
  2. Open the settings window for the "Source" that captures the game client (right click on the source and select "Properties")
  3. At the bottom of the properties window, check the option "Capture third-party overlays"
  4. Save the changes

Overwolf should now be displayed correctly in your stream.