I've found the ticket for #5880
but can't work out from that whether I'm supposed to be seeing consumergroup working or not (Metricbeat 5.6.7, Kafka 1.0.0). So is it
(a) yes, it should be working, I'm doing something wrong
(b) no, it hasn't been released yet, a future version of 5.6.x will include the fix
(c) no, it'll never be fixed in 5.6.x, I'll have to upgrade to 6.x
or something else?