Lots of screen flicker in Dota with Vulkan AND G-SYNC


just tried Vulkan instead of OpenGL for Dota 2 and I have A LOT of screen flickering in the menus, but when the game starts it’s okay. Disabling G-SYNC completely solves the issue, but it’s not really an acceptable solution.

I have a Lenovo Legion Y-520 laptop with nvidia 1060 card, using proprietary drivers under Linux Mint 19.3 fully updated.

Any suggestions?