Hyper stats a non-existent container error

[YaoZengzeng]

When I hyper stats a non-existent container, the return message is not stable.Sometimes it may return the message that the container is not exist.But sometimes it may return the normal stats as if it is an existent container.
Especially when I hyper stats a non-existent container with "--no-stream=false", at first it may return the stats, but after a while the stats disappear as if it realize the mistake!