Hashrate drop with 0.6-83@191017 on AMD RX580

Hello, I see some odd behavior with my AMD RX580 after upgrade. Both cards start at 28 MH/s per card at the beginning on Phoenix miner and drops down to 14 MH/s per card after sometime. I did not change any settings on overclocking. Cards also hot now. Do you know what is happening?

Thank you.

In any case, 28MH is not enough for RX580 without any upgrades, look for the problem on your side.