Tooltip display wrong color when fill: {type:"gradient"}

[pgredigui]

Description

When I am usins a stacked bar chart and want to use a gradient fill property, the colour of the tooltip is wrong when I hover it. It always display the same colour (the one of the first element) instead of the colour of the element on which I am hovering (which is what it usually does)

Steps to Reproduce

1. create a stacked bar chart
2. add in the options : {fill:{type:"gradient"}}
3. Hover your graph

Expected Behavior

The colour of the tooltip should be the same as the one of the elements on which I am hovering

Actual Behavior

Screenshots

Reproduction Link

https://codepen.io/pgredigui/pen/JjLzNBv

[Hewsman]

up. is there a work around for this?

[junedchhipa]

duplicate of #4755