m15 R7, external FreeSync monitor, black screen

Hello, I have an external gaming monitor that is Freesync compatible (Samsung C32G35T, Freesync range 48-165Hz) connected at its DP port to the m15 R7 (3070Ti)'s Thunderbolt port. I believe VRR with freesync monitors can only be supported by nvidia rigs through DP, but it seems that the Thunderbolt port is hard-wired to the iGPU instead. With this setup, with VRR activated on the intel graphics suite and gsync in nvidia control panel, the monitor turns black or flashes black upon entering a game. Sometimes the monitor will go completely black and nothing else, or sometimes it will just flash on and off. For some strange reason, physically switching the monitor off then on again gets rid of the problem and I can confirm freesync to work (looking at the monitor's own menu and refresh rates). However, the problem returns every time the laptop is rebooted or comes out of sleep mode. What could be the problem here? I've tried adjusting the freesync range manually with CRU as suggested in other online forums but this hasn't helped. Connecting the monitor by HDMI eliminates any VRR/freesync capabilities altogether.