Same here as many others have.
Mostly for me playing Path of Exile.I got a Black Screen .Game Closes and Driver gets restored said Windows System logs "amdkmdap".After this im not able to open the Driver settings till restart.
I hope this will get fixed soon.Im already regreting that i buyed a Radeon after many Years 
Computer: MSI MS-7B61
CPU: Intel Core i5-8600K (Coffee Lake-S, U0)
3600 MHz (36.00x100.0) @ 2598 MHz (26.00x100.0)
Motherboard: MSI Z370 GAMING PLUS (MS-7B61)
BIOS: 1.80, 08/26/2019
Chipset: Intel Z370 (Kaby Lake)
Memory: 32768 MBytes @ 1066 MHz, 15-15-15-36
- 8192 MB PC25600 DDR4 SDRAM - G Skill F4-3200C16-8GIS
- 8192 MB PC19200 DDR4 SDRAM - Crucial Technology CT8G4DFS824A.C8FHD
- 8192 MB PC25600 DDR4 SDRAM - G Skill F4-3200C16-8GIS
- 8192 MB PC19200 DDR4 SDRAM - Crucial Technology CT8G4DFD824A.C16FH
Graphics: MSI RX 5700 XT Gaming X
AMD Radeon RX 5700 XT, 8192 MB GDDR6 SDRAM
Drive: WDC WD40EZRX-00SPEB0, 3907.0 GB, Serial ATA 6Gb/s @ 6Gb/s
Drive: WDC WD80EMAZ-00WJTA0, 7814.0 GB, Serial ATA 6Gb/s @ 6Gb/s
Drive: CT500MX500SSD1, 488.4 GB, Serial ATA 6Gb/s @ 6Gb/s
Drive: Corsair Force GT, 87.9 GB, Serial ATA 6Gb/s @ 6Gb/s
Drive: WDC WD10JFCX-68N6GN0, 976.8 GB, Serial ATA 6Gb/s @ 6Gb/s
Sound: Intel Kaby Lake - High Definition Audio / cAVS (Audio, Voice, Speech) [A0]
Sound: ATI/AMD Navi10 - High Definition Audio Controller
Network: Intel Ethernet Connection I219-V
OS: Microsoft Windows 10 Professional (x64) Build 18363.535 (1909/November 2019
