Bug in Phoenixminer 5.1c - after loosing connection it is still mining on gpu consuming power and finding shares

GPUs power: 600.4 W
Eth: Connecting to ethash pool eu1.ethermine.org:4444 (proto: EthProxy)
Eth: Could not connect to ethash pool eu1.ethermine.org:4444: Connection refused
Eth: Reconnecting in 5 seconds...
Unable to submit ethash share - pool disconnected
Eth: Connecting to ethash pool eu1.ethermine.org:4444 (proto: EthProxy)
Eth: Could not connect to ethash pool eu1.ethermine.org:4444: Connection refused
Eth: Reconnecting in 5 seconds...
Unable to submit ethash share - pool disconnected
Eth: Connecting to ethash pool eu1.ethermine.org:4444 (proto: EthProxy)
Eth: Could not connect to ethash pool eu1.ethermine.org:4444: Connection refused
Eth: Reconnecting in 5 seconds...
Unable to submit ethash share - pool disconnected
Eth: Connecting to ethash pool eu1.ethermine.org:4444 (proto: EthProxy)
Eth: Could not connect to ethash pool eu1.ethermine.org:4444: Connection refused
Eth: Reconnecting in 5 seconds...
Unable to submit ethash share - pool disconnected