We are using call center module. We noticed one thing, if the agent change status to not available or on break and  then after a while come back to change the status to available. His stats (num of calls answered or talk_time) reset to 0.

Example,

callcenter_config queue list agents sales@domain
name|system|uuid|type|contact|status|state|max_no_answer|wrap_up_time|reject_delay_time|busy_delay_time|no_answer_delay_time|last_bridge_start|last_bridge_end|last_offered_call|last_status_change|no_answer_count|calls_answered|talk_time|ready_time
101@domain|single_box||callback|[call_timeout=30]user/130@domain|Available|Waiting|0|0|0|0|0|0|0|1489009000|1488960061|1|0|0|0
102@domain|single_box||callback|[call_timeout=30]user/111@jdomain|Available|Waiting|0|0|60|60|0|1489009008|1489009016|1489009000|1488960061|0|1|8|0
  
Here I see 102, had one call for 8 seconds,
Change the agent status to break.
session:execute("set", "res=${callcenter_config(agent set status ${caller_id_number}@${domain_name} 'On Break')}")

101@domain|single_box||callback|[call_timeout=30]user/101@domain|Available|Waiting|0|0|0|0|0|0|0|1489009000|1488960061|1|0|0|0
102@domain|single_box||callback|[call_timeout=30]user/101@domain|On Break|Waiting|0|0|60|60|0|1489009008|1489009016|1489009000|1489009163|0|1|8|0

Change the agent state to Available On Demand, stats are still there.
session:execute("set", "res=${callcenter_config(agent set status ${caller_id_number}@${domain_name} 'Available (On Demand)')}")

101@domain|single_box||callback|[call_timeout=30]user/101@domain|Available|Waiting|0|0|0|0|0|0|0|1489009000|1488960061|1|0|0|0
102@domain|single_box||callback|[call_timeout=30]user/102@domain|Available (On Demand)|Waiting|0|0|60|60|0|1489009008|1489009016|1489009000|1489009252|0|1|8|0

Now changing to Available and stats are reset ed to 0,0,
session:execute("set", "res=${callcenter_config(agent set status ${caller_id_number}@${domain_name} 'Available')}")

101@domain|single_box||callback|[call_timeout=30]user/101@domain|Available|Waiting|0|0|0|0|0|0|0|1489009000|1488960061|1|0|0|0
102@domain|single_box||callback|[call_timeout=30]user/102@domain|Available|Waiting|0|0|60|60|0|1489009008|1489009016|1489009000|1489009415|0|0|0|0

Is there way to control this behavior. So basically we can to control the call stats.