Issue with kibana 5.4 and heat map - another problem

[Gianluke]

Hi guys,
when a dashboard contains an enhanced_tilemap with heatmap, if I try to enlarge any of the widgets on the page I get the following error:

If instead enhanced_tilemap is of one of another type the problem does not occur.

[Gianluke]

I also tried to update the plugin with the latest available for 5.4 version, without success.