Docker stats showing 2 dashes

Hi, we’re running our app (on Google Cloud) in multiple docker containers. When I’m viewing docker stats however I see that the containers are running very strange. Sometimes it shows the data for 2 seconds and then the data disappears for some seconds and only shows dashes. This is happening to all containers that are running. However when I look at the stats, no containers have high CPU or Memory. Is this normal or does somebody has some suggestions? We’re running version 23.0.1 of Docker.