Is it normal for a metricbeat process thats runnning as a docker container to record "docker.memory.usage.pct" (one of the data fields collected by metricbeat) with values higher than 100%(1.00067, 1.00044...)?
metricbeat version : 5.6
Have you tried if this happens also in newer versions? In case it was an issue, it's very likely it's already fixed in recent versions.