Same bug is also reproducable when launching native version of Rocket League.

Here are the logs:
sep 01 12:20:56 Marko-PC kernel: amdgpu 0000:03:00.0: [gfxhub] page fault
(src_id:0 ring:158 vmid:0 pasid:0, for process  pid 0 thread  pid 0)
sep 01 12:20:56 Marko-PC kernel: amdgpu 0000:03:00.0:   in page starting at
address 0x0000000000fff000 from client 27
sep 01 12:20:56 Marko-PC kernel: amdgpu 0000:03:00.0:
GCVM_L2_PROTECTION_FAULT_STATUS:0x00001B3C
sep 01 12:20:56 Marko-PC kernel: amdgpu 0000:03:00.0:          MORE_FAULTS: 0x0
sep 01 12:20:56 Marko-PC kernel: amdgpu 0000:03:00.0:          WALKER_ERROR:
0x6
sep 01 12:20:56 Marko-PC kernel: amdgpu 0000:03:00.0:         
PERMISSION_FAULTS: 0x3
sep 01 12:20:56 Marko-PC kernel: amdgpu 0000:03:00.0:          MAPPING_ERROR:
0x1
sep 01 12:20:56 Marko-PC kernel: amdgpu 0000:03:00.0:          RW: 0x0
sep 01 12:21:12 Marko-PC kernel: [drm:amdgpu_job_timedout [amdgpu]] *ERROR*
ring sdma0 timeout, signaled seq=7198, emitted seq=7200
sep 01 12:21:12 Marko-PC kernel: [drm:amdgpu_job_timedout [amdgpu]] *ERROR*
Process information: process RocketLeague pid 3035 thread RocketLeag:cs0 pid
3042