[AMDGPU][5.8.8][RX5700XT] Hard crash on regular desktop

Brief summary of the problem:

The system crashed and rebooted while idling on the web browser.

Hardware & System description:

     System:    Host: _HOST_ Kernel: 5.8.8-zen1-1-zen x86_64 bits: 64 compiler: N/A Desktop: KDE Plasma 5.19.5 
                Distro: Arch Linux 
     Machine:   Type: Desktop Mobo: ASUSTeK model: PRIME B350-PLUS v: Rev X.0x serial: <root required> 
                UEFI [Legacy]: American Megatrends v: 5220 date: 09/12/2019 
     CPU:       Topology: 8-Core model: AMD Ryzen 7 3700X bits: 64 type: MT MCP arch: Zen L2 cache: 4096 KiB 
                flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm bogomips: 114986 
                Speed: 3589 MHz min/max: 2200/3600 MHz
     Graphics:  Device-1: Advanced Micro Devices [AMD/ATI] Navi 10 [Radeon RX 5600 OEM/5600 XT / 5700/5700 XT] 
                vendor: Sapphire Limited driver: amdgpu v: kernel bus ID: 0c:00.0 
                Display: x11 server: X.Org 1.20.9 driver: amdgpu resolution: 2560x1440~144Hz 
                OpenGL: renderer: AMD Radeon RX 5700 XT (NAVI10 DRM 3.38.0 5.8.8-zen1-1-zen LLVM 10.0.1) v: 4.6 Mesa 20.1.7 
                direct render: Yes 

How to reproduce the issue:

• Use your Xorg Desktop. Be using KDE Plasma? Be using Firefox?

Attached files:

• Dmesg log:

sept. 15 12:02:01 _HOST_ kernel: [drm:amdgpu_dm_atomic_commit_tail [amdgpu]] *ERROR* Waiting for fences timed out!
sept. 15 12:02:01 _HOST_ kernel: [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring gfx_0.0.0 timeout, signaled seq=15097099, emitted seq=15097101

• Xorg log: [Xorg.0.log.old.gz]
• Any other log