Info Request - Game Stuttering

• CPU - AMD Ryzen 5 3600
• GPU - AMD Radeon RX Vega 64
• Ram - Corsair LPX DDR4 3000MHz 8GB x2
• Resolution you are playing at: 1920x1080
• Screen mode you are playing at - Full Screen Exclusive
• What kind of Harddrive do you have the game installed on (HD, SSD) : Samsung NVME 1TB
• When did the issue occur: playing Skirmish, when large amount of AI units are moving

update: noticed that when it starts to stutter, switch back to classic graphic will reveal that it's actually progressing much further than HD graphic, however the audio is still synced to the HD graphic

last night i had a case that it stutters so bad, that the HD graphic completely hangs, but the classic graphic is still working, after a while the game thinks that I have lost connection, counted down and then the whole game hangs,couldn't jump back to Windows desktop except for the Start menu, need to sign out to regain control of Windows