groupBy: field selection incomplete

[sh0rez]

The Group By field selector appears to always swallow the first field of the dataframe, making it weirdly order dependent on a 2-field frame to select the right field.

[gabor]

hi @sh0rez , does this problem still happen on current grafana and json plugin version?
if it still happens, could you please provide a sample JSON file to see the problem, and the exact setup of the query-editor? thank you!