Kibana histogram do not display value zero

Elastic Stack Elasticsearch
1

Hello,

I can't figure out why kibana histogram doesn't display any point when value is equal to zero .
I set it as a line + points .

i checked the query and the result is :

"facets" : {
"0" : {
"_type" : "date_histogram",
"entries" : [
{
"time" : 1412072076000,
"count" : 1,
"min" : 0,
"max" : 0,
"total" : 0,
"total_count" : 1,
"mean" : 0
},
{
"time" : 1412072080000,
"count" : 2,
"min" : 2,
"max" : 2,
"total" : 2,
"total_count" : 1,
"mean" : 2
},
{
"time" : 1412072170000,
"count" : 1,
"min" : 0,
"max" : 0,
"total" : 0,
"total_count" : 1,
"mean" : 0
},
{
"time" : 1412079637000,
"count" : 1,
"min" : 15,
"max" : 15,
"total" : 15,
"total_count" : 1,
"mean" : 15
},

and i have absolutely no point when value is 0 , which actually is a value.

I tried to check the zero fill option be it make some weirds things , it had some zero points around each points .

Any help will be really appreciated .

Thanks