If you stream your gameplay with OBS Studio, Streamlabs or OBS.Live (by StreamElements), use the 'Game Capture' mode, and w to display Overwolf overlay in your stream - please follow these steps:
- Open OBS Studio/Streamlabs/OBS.Live
- Open the settings window for the "Source" that captures the game client (right click on the source and select "Properties")
- At the bottom of the properties window, check the option "Capture third-party overlays"
- Save the changes
Overwolf should now be displayed correctly in your stream.