Heat map range numbers don't update immediately

I am looking at the heatmap at https://chaoss.biterg.io/app/kibana#/dashboard/b7b169e0-14e3-11e9-8aac-ef7fd4d8cbad

When I filter out Bitergia, the colors change in the heatmap, even though the legend on the right says the colors should still apply to the same numbers.

I don't understand why the colors get darker, despite taking away entries, not adding any.

Thoughts?

/cc @dicortazar @alpgarcia @sanacl