Describe the bug
loki-canary throws in logs msg="Error from iterator" err="reached tail max duration limit"
this repeats every 1 hour. See screesnhot below.

To Reproduce
Steps to reproduce the behavior:

1. Started Loki 2.4.1
2. Started loki-canary 2.4.1
3. look at loki-canary logs

Expected behavior
No errors reported

Environment:

• Infrastructure: kubernetes 1.18
• Deployment tool: helm chart grafana/loki-canary + tanka on defaults

Screenshots, Promtail config, or terminal output
we got 35 nodes

snapshot https://snapshot.raintank.io/dashboard/snapshot/lhr9VUJ4WmDAp26r49h50o7BjALSlys2?orgId=2