Metricbeat problem on elasticsearch

Hi,

I have recently updated all my metricbeat agents from all the hosts from 6.* to 7.* version and since then i cannot get data on the infrastructure tab.

I checked on the index management that then new indices of the metricbeat are not created with the date as was done before but only with metricbeat-(version). In the past the format was metricbeat-(version)-(date)

Is there any problem on the metricbeat?
Filebeat and winlogbeat works fine through logstash.

I can get metricbeat indices but the data don't display on the Infrastructure tab. Do you have any idea?