It looked like we already fixed this bug: https://bugs.mysql.com/bug.php?id=90351
But in MySQL 8.0.16 it still happening, we upgraded to 8.0.16 because basically many graphs were ruined because of this bug, but still happening, but not that frequent anymore maybe once in every few hours previously it was happening all the time:
I have started Iwo's script on the master server to monitor the statistics and yes we can see it is happening:
But because we took MySQL 8 code I am pretty sure this could happen on Percona Server 8 as well, and it ruins most of the PMM graphs.
We should review's oracle fix , why is this happening in MySQL 8 again.