Hi!
When creating a Kibana Line Chart Visualization in v7.12.0 or v7.12.1, I encounter an issue that duplicate lines are shown, when adding an eleventh line. In my case, I have 3 y-axes but I observe the same issue for 1 y-axis.
The pictures illustrate the issue:
Here, I have exactly 10 lines. Everything is shown as expected.
Now, I add an eleventh line, "KTist" which results in two new lines for "KTist". I selected the "show dots" option. The dots are shown only for the latter of the two lines. In the screenshot, I hover over the first "KTist" so it is shown in the foreground.
Also, the saved object JSON only shows one entry for "KTist".
This seems to be a bug in Kibana. I do not observe that behavior in v7.4.2.
Can anybody help?