On Kusama we get logs of alerts:

 Continuous task large-statement-fetcher on node kusama-validator-aws-ue1-1-int.aws.parity.io:9615 ended unexpectedly.

producing a lot of noise. I believe @tomaka mentioned that there is some heuristic to detect whether a task is supposed to stay running or is short lived. In this particular case the task is short lived (spawned to fetch some data, once it succeeds it will stop), so the heuristic seems to be wrong.