VRR/Freesync not working in Gamescope

I have an RX 6700 XT connected to an LG C2 TV over HDMI (should be running at HDMI 2.0 since 2.1 hasn't been sorted out yet). Freesync works in desktop mode when using mutter-vrr and gnome-control-center-vrr packages. I can run vrrtest and see my FPS counter on the TV match what shows on the application. However, in gamescope, Freesync does not work. There's no option in the gui to enable VRR, and adding "export GAMESCOPE_VRR_ENABLED=1" and "--adaptive-sync" to the gamescope command in the gamescope session script hasn't changed anything either. The TV thinks that Freesync Premium is enabled between the PC and the TV, but the FPS counter stays locked to the maximum refresh rate (119). I've tried updating gamescope to gamescope-git and mesa to mesa-git.