@Thuunder7 did you upgrade your whole stack to 8.2.3? what version is your Elasticsearch and Kibana running on? The metricbeat UI in Kibana shows the data stored in your metrics-* elasticsearch indices and if the documents report the same data as what you're seeing in the UI, then there might be something else going on.
Yes i did upgrade whole stack to 8.2.3. First i upgraded elasticsearch nodes and kibana but i gave two weeks until i decided to upgrade metricbeat and logstash. During those 2 weeks with metricbeat being on version 7.16.3 everything looked fine on Kibana stack monitoring, but when i upgraded metricbeat this "issue" appeared.
I looked into metrics-* indices but i only have these two: