Problem with Graphs showing sad smilies after auto refresh

Why am i expirencing graph update issue.
Graphs have bucket for source of data, but when i open dashboard it takes few seconds to load all graphs and it loads all graphs up to date nothing wrong so far as i have 1 minute upload interval and displaying 2 days in each graph.

But why when it auto refreshes the graps usually this issue shows up.
And why it also messes up graph pictures by compressing picture in half?

Thanks in advance


it seems that you are plotting too much data points. What is your interval recording for such buckets?

We are working in a functionality to aggregate data by hours, days, etc. that will solve load and display issues for large periods of time, or many data points due to sampling intervals.