Burrow sees consumer groups, and then doesn't

I am running burrow 1.1.0 with kafka 0.11 and zookeeper 3.4.5. I can run a "curl http://127.0.0.1:8000/v3/kafka/local/consumer" right after I start burrow, and see all the groups. But if I run a "curl http://127.0.0.1:8000/v3/kafka/local/consumer/namehere/status" I get back

```{"error":false,"message":"consumer status returned","status":{"cluster":"local","group":"namehere","status":"NOTFOUND","complete":1,"partitions":[],"partition_count":0,"maxlag":null,"totallag":0},"request":{"url":"/v3/kafka/local/consumer/namehere/status","host":"hostname-01"}}```

Then if I run "curl http://127.0.0.1:8000/v3/kafka/local/consumer" again, I get a list without that one.

Even weirder this works fine in a staging environment, but is failing in prod. Even though both have the same versions kafka, burrow, and zookeeper.

Start by reproducing the behavior through the mentioned /v3/kafka/local/consumer and /v3/kafka/local/consumer/namehere/status endpoints, comparing production with staging on Kafka 0.11, Burrow 1.1.0, and ZooKeeper 3.4.5. Trace why a group disappears between the list and status requests; done means the consumer list and status behavior remain consistent in both environments.

Written by the indexing model from the issue text.