Heavy flicker after alt-tabbing in NFS 2 and NFS High Stakes

Hello, was testing the latest version of DDrawCompat and decided to experiment with the alt-tab solutions for these two games.

From my testing with keepvidmem(1) set, both games present the same flickery behavior, but aside from that everything else seems to work like normal (no missing/glitchy textures etc).

As for it set to (0), the dashboard of the car in NFS 2 (Software Renderer) turns completely black but goes back to normal once you switch views or pause/unpause the game. HS on the other hand black screens entirely with just the audio playing in the background.

OS: Windows 8.1
GPU: Intel iGPU
CPU: 3rd gen Celeron
DDrawCompat-nfs2sen.log
DDrawCompat-nfs4.log