Visualizations: changing aggregation text on a median?

[tedder (ted)]

When creating a line chart, I'm seeing "50th Percentile of [Fieldname]" for labels, like this:

If I set a custom label, it only changes the ".. of [Fieldname]" part- in other words, it doesn't seem to be possible to get rid of the "50th percentile of" text. In the example below I set the custom label to literally "custom".

This seems to be unique to the median type- with the others, a custom label will overwrite the entire label. Here's an example with 'minimum':

I tested and this is true on 'area' and 'horizontal bar' graphs too.

I'm on 7.6.

[tedder (ted)]

Possibly related things:

• kibana#13025 (though it's a bit more esoteric/feature-creep)
• label change from 'median of' to '50th percentile of' (this is only context, not changing the customization)
• discussion/acknowledgement that the label text is fixed (and was considered 'expected behavior')- where the label is created, including with the custom bit, in the .ts
• yet it was fully customizable (!) in 2016

[wylie (Wylie Conlon)]

I fixed this, but it is not out yet. It will be in 7.7: https://github.com/elastic/kibana/pull/58521