After a few hours mining my second GPU stops mining and I see 0.000 MH/s with the statement "wdog GPU2 not responding" and  "wdog Thread(s) not responding. Restarting."
But nothing happens.

I am not sure how to resolve this issue so I am looking for ideas here.
Below are the details of my set up.

RX 580 Saphire Nitro - stock bios
Driver: Adrenalin 2020 20.9.1
Miner: Phoenix 5.3b
cclock: 1170
mclock: 2170
cvddc: 850
mvddc: 850
Fan: 35

setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_SINGLE_ALLOC_PERCENT 100
"C:\Users\Arthur\Desktop\Ethereum\Phoenix ""Miner\PhoenixMiner.exe" -amd -daglim 1 -dagrestart 1 -eres 0 -rvram 0 -rxboost 1 -pool eth-us-east1.nanopool.org:9999 -pool2 eth-us-west1.nanopool.org:9999 -wal 0x....../xxx@gmail.com -pass x -proto 2 -gt 43,77 -cclock 1200,1170 -mclock 2200,2170 -cvddc 850 -mvddc 850 -astats 1

Any idea or assistance is appreciated.
thanks