Warp Split Tunnel and L2TP VPN quitting

We need to run WARP alongside an L2TP VPN (in Exclude mode). We’ve therefore configured split tunnel as per this doc: Split Tunnels · Cloudflare Zero Trust docs

When WARP is active though the VPN quits within a couple seconds after connecting. If you temporarily disconnect Warp the L2TP VPN is fine. Any ideas?