It looks like the pause function has some bug:
I was mining HXV (CN Heavy) with the 0.33b6, with two RX 570 and a Ryzen 1700.
After several hours of mining with stable hashrates, pausing the CPU made the hashrates of both my RX 570 to drop and they didn't get back to their normal values until I restart the miner:
13:52:33 | Hashrate CPU Thread 0: 57.66 h/s
13:52:33 | Hashrate CPU Thread 1: 4.41 h/s
13:52:33 | Hashrate CPU Thread 2: 4.43 h/s
13:52:33 | Hashrate CPU Thread 3: 55.15 h/s
13:52:33 | Hashrate CPU Thread 4: 3.88 h/s
13:52:33 | Hashrate CPU Thread 5: 4.28 h/s
13:52:33 | Hashrate CPU Thread 6: 57.14 h/s
13:52:33 | Hashrate CPU Thread 7: 4.19 h/s
13:52:33 | Hashrate CPU Thread 8: 4.40 h/s
13:52:33 | Hashrate CPU Thread 9: 56.17 h/s
13:52:33 | Hashrate CPU Thread 10: 4.11 h/s
13:52:33 | Hashrate CPU Thread 11: 4.39 h/s - Total CPUs: 260.17 h/s
13:52:33 | Hashrate GPU Thread 12: 476.62 h/s
13:52:33 | Hashrate GPU Thread 13: 476.70 h/s - Total GPU 0: 953.31 h/s
13:52:33 | Hashrate GPU Thread 14: 470.81 h/s
13:52:33 | Hashrate GPU Thread 15: 470.81 h/s - Total GPU 1: 941.62 h/s
13:52:34 | Total: 2155.09 h/s - Max: 2235.68 h/s
13:52:36 | GPU 1 Thread 14 Lane 419 finds a Share, value 78000
13:52:36 | Accepted by the pool in 90 ms.
13:53:27 | GPU 0: Temp: 61C - Fan: 17% -- Shares: Good: 176 Bad: 0
13:53:27 | GPU 1: Temp: 56C - Fan: 17% -- Shares: Good: 198 Bad: 0
13:54:23 | Pool sends a new Job.
13:54:43 | GPU 1 Thread 15 Lane 329 finds a Share, value 78000
13:54:43 | Accepted by the pool in 78 ms.
13:55:06 | Pause CPUs
13:56:07 | Hashrate CPU Thread 0: 0.00 h/s
13:56:07 | Hashrate CPU Thread 1: 0.00 h/s
13:56:07 | Hashrate CPU Thread 2: 0.00 h/s
13:56:07 | Hashrate CPU Thread 3: 0.00 h/s
13:56:07 | Hashrate CPU Thread 4: 0.00 h/s
13:56:07 | Hashrate CPU Thread 5: 0.00 h/s
13:56:07 | Hashrate CPU Thread 6: 0.00 h/s
13:56:07 | Hashrate CPU Thread 7: 0.00 h/s
13:56:07 | Hashrate CPU Thread 8: 0.00 h/s
13:56:07 | Hashrate CPU Thread 9: 0.00 h/s
13:56:07 | Hashrate CPU Thread 10: 0.00 h/s
13:56:07 | Hashrate CPU Thread 11: 0.00 h/s - Total CPUs: 0.00 h/s
13:56:07 | Hashrate GPU Thread 12: 464.50 h/s
13:56:07 | Hashrate GPU Thread 13: 464.23 h/s - Total GPU 0: 928.72 h/s
13:56:07 | Hashrate GPU Thread 14: 452.25 h/s
13:56:07 | Hashrate GPU Thread 15: 452.25 h/s - Total GPU 1: 904.49 h/s
13:56:07 | Total: 1833.21 h/s - Max: 2235.68 h/s