Massive WAF enocean acceptance problem, instable behavior

I’ve got indeterministic failures with the enocean binding with version 1.7, enocean via USB stick. Most of the time everything works fine, but without warning some enocean switch decides to quit working.

The bindings look all like

Switch wbf3_roomL_switch1_up		"Zimmer Links Schalter Jalousie Auf"			(wbf3_grp_roomL)					{ enocean="{id=fe:fc:8d:6a, eep=F6:02:01, channel=B, parameter=O}" }
Switch wbf3_roomL_switch1_down		"Zimmer Links Schalter Jalousie Ab"				(wbf3_grp_roomL)					{ enocean="{id=fe:fc:8d:6a, eep=F6:02:01, channel=B, parameter=I}" }

And the rules

rule "wbf3_roomL_switch1_up"
when Item wbf3_roomL_switch1_up changed to ON then
	shutterControl.apply(wbf3_roomL_shutter0_up, wbf3_roomL_shutter0_down)
end

rule "wbf3_roomL_switch1_down"
when Item wbf3_roomL_switch1_down changed to ON then
	shutterControl.apply(wbf3_roomL_shutter0_down, wbf3_roomL_shutter0_up)
end

After a while, the switches no longer changes the according states (log snippet)

2016-04-09 18:14:26.893 [INFO ] [Thread-50           ] [org.opencean.core.ESP3Host    ] - RadioPacketRPS[header=[Header: dataLength=07, optionalDataLength=07, packetType=01, crc8h=7A], payload=Payload: data=[F6, 50, FE, FC, 8D, 6A, 30], optionaldata=[01, FF, FF, FF, FF, 59, 00], crc8d=-31], raw=[55, 00, 00, 07, 01, 6C, 01, FF, FF, FF, FF, 59, 00, 02], [sender=FE:FC:8D:6A, repeaterCount=0]
2016-04-09 18:14:26.894 [INFO ] [Thread-50           ] [opencean.core.eep.RockerSwitch] - Current State: buttonAI=null, buttonAO=null, buttonBI=Pressed, buttonBO=null
2016-04-09 18:14:26.894 [INFO ] [Thread-50           ] [org.opencean.core.ESP3Host    ] - Received RadioPacket with value Pressed
2016-04-09 18:14:27.961 [INFO ] [Thread-50           ] [org.opencean.core.ESP3Host    ] - RadioPacketRPS[header=[Header: dataLength=07, optionalDataLength=07, packetType=01, crc8h=7A], payload=Payload: data=[F6, 00, FE, FC, 8D, 6A, 20], optionaldata=[01, FF, FF, FF, FF, 59, 00], crc8d=82], raw=[55, 00, 00, 07, 01, 6C, 01, FF, FF, FF, FF, 59, 00, 02], [sender=FE:FC:8D:6A, repeaterCount=0]
2016-04-09 18:14:27.962 [INFO ] [Thread-50           ] [opencean.core.eep.RockerSwitch] - Current State: buttonAI=null, buttonAO=null, buttonBI=Released, buttonBO=null
2016-04-09 18:14:27.962 [INFO ] [Thread-50           ] [org.opencean.core.ESP3Host    ] - Received RadioPacket with value Released
2016-04-09 18:14:28.665 [INFO ] [Thread-50           ] [org.opencean.core.ESP3Host    ] - RadioPacketRPS[header=[Header: dataLength=07, optionalDataLength=07, packetType=01, crc8h=7A], payload=Payload: data=[F6, 70, FE, FC, 8D, 6A, 30], optionaldata=[01, FF, FF, FF, FF, 55, 00], crc8d=-29], raw=[55, 00, 00, 07, 01, 6C, 01, FF, FF, FF, FF, 55, 00, FE], [sender=FE:FC:8D:6A, repeaterCount=0]
2016-04-09 18:14:28.666 [INFO ] [Thread-50           ] [opencean.core.eep.RockerSwitch] - Current State: buttonAI=null, buttonAO=null, buttonBI=null, buttonBO=Pressed
2016-04-09 18:14:28.667 [INFO ] [Thread-50           ] [org.opencean.core.ESP3Host    ] - Received RadioPacket with value Pressed
2016-04-09 18:14:29.633 [INFO ] [Thread-50           ] [org.opencean.core.ESP3Host    ] - RadioPacketRPS[header=[Header: dataLength=07, optionalDataLength=07, packetType=01, crc8h=7A], payload=Payload: data=[F6, 00, FE, FC, 8D, 6A, 20], optionaldata=[01, FF, FF, FF, FF, 5C, 00], crc8d=19], raw=[55, 00, 00, 07, 01, 6C, 01, FF, FF, FF, FF, 5C, 00, 43], [sender=FE:FC:8D:6A, repeaterCount=0]
2016-04-09 18:14:29.634 [INFO ] [Thread-50           ] [opencean.core.eep.RockerSwitch] - Current State: buttonAI=null, buttonAO=null, buttonBI=null, buttonBO=Released
2016-04-09 18:14:29.634 [INFO ] [Thread-50           ] [org.opencean.core.ESP3Host    ] - Received RadioPacket with value Released
2016-04-09 18:14:30.236 [INFO ] [Thread-50           ] [org.opencean.core.ESP3Host    ] - RadioPacketRPS[header=[Header: dataLength=07, optionalDataLength=07, packetType=01, crc8h=7A], payload=Payload: data=[F6, 10, FE, FC, 8D, 6A, 30], optionaldata=[01, FF, FF, FF, FF, 5B, 00], crc8d=48], raw=[55, 00, 00, 07, 01, 6C, 01, FF, FF, FF, FF, 5B, 00, 28], [sender=FE:FC:8D:6A, repeaterCount=0]

while channel A is still working

2016-04-09 18:14:30.236 [INFO ] [Thread-50           ] [org.opencean.core.ESP3Host    ] - RadioPacketRPS[header=[Header: dataLength=07, optionalDataLength=07, packetType=01, crc8h=7A], payload=Payload: data=[F6, 10, FE, FC, 8D, 6A, 30], optionaldata=[01, FF, FF, FF, FF, 5B, 00], crc8d=48], raw=[55, 00, 00, 07, 01, 6C, 01, FF, FF, FF, FF, 5B, 00, 28], [sender=FE:FC:8D:6A, repeaterCount=0]
2016-04-09 18:14:30.236 [INFO ] [Thread-50           ] [opencean.core.eep.RockerSwitch] - Current State: buttonAI=Pressed, buttonAO=null, buttonBI=null, buttonBO=null
2016-04-09 18:14:30.237 [INFO ] [Thread-50           ] [org.opencean.core.ESP3Host    ] - Received RadioPacket with value Pressed
2016-04-09 18:14:30.238 [INFO ] [EventAdmin Async Event Dispatcher Thread] [runtime.busevents             ] - wbf3_roomL_switch0_state received command ON
2016-04-09 18:14:30.246 [INFO ] [wbf3_roomL_switch0_state] [runtime.busevents             ] - wbf3_roomL_light0_state received command ON

sometimes it even seems to trigger the unrelated channel a switch!

2016-04-10 00:10:55.750 [INFO ] [Thread-50           ] [org.opencean.core.ESP3Host    ] - RadioPacketRPS[header=[Header: dataLength=07, optionalDataLength=07, packetType=01, crc8h=7A], payload=Payload: data=[F6, 37, FE, FC, 8D, 6A, 30], optionaldata=[01, FF, FF, FF, FF, 56, 00], crc8d=-62], raw=[55, 00, 00, 07, 01, 6C, 01, FF, FF, FF, FF, 56, 00, C1], [sender=FE:FC:8D:6A, repeaterCount=0]
2016-04-10 00:10:55.751 [INFO ] [Thread-50           ] [opencean.core.eep.RockerSwitch] - Second action received for id FE:FC:8D:6A. Not expected.
2016-04-10 00:10:55.752 [INFO ] [Thread-50           ] [opencean.core.eep.RockerSwitch] - Current State: buttonAI=null, buttonAO=null, buttonBI=null, buttonBO=Pressed
2016-04-10 00:10:55.752 [INFO ] [Thread-50           ] [org.opencean.core.ESP3Host    ] - Received RadioPacket with value Pressed
2016-04-10 00:10:55.753 [INFO ] [Thread-50           ] [org.opencean.core.ESP3Host    ] - Received RadioPacket with value Pressed
2016-04-10 00:10:55.753 [INFO ] [EventAdmin Async Event Dispatcher Thread] [runtime.busevents             ] - wbf3_roomL_switch0_state received command OFF
2016-04-10 00:10:55.762 [INFO ] [wbf3_roomL_switch0_state] [runtime.busevents             ] - wbf3_roomL_light0_state received command OFF

Anybody any idea? enocean stick defective? switch defective? openhab defective?