How to hide the unnecessary string 'filters' from label

I have created a bar chart and i have used split chart feature to split the graph into two. In split chart, i have selected filters as subaggregation and i have created two filters and given the custom label names X and Y. But in kibana the label is showing as 'X: filters' and 'Y: filters'. How to change that to just X and Y

It doesn't look like it's possible to change that in current Kibana. I searched and didn't find any issues about it here;

You could create an issue and ask for that ":filters" to be removed, or to be a setting.