"42 METRIC" error in Back/Text Color

Hi at All, i istall kibana 6.1 but in the metric there the " BACTG/TEXT" color and the legend. Is a Bug or is a choise? att. img of version 6.0 and 6.1. thank nyou thery much.Also the legend that identified the range and allowed to change colors disappeared!!!!:joy::joy::joy::joy::joy::joy::joy:
Cattura60
versione6.0
Cattura61
versione6.1

No everyone can answer me? nessuno può suggerirmi un workaround?
Help me please.