Treemap: setOption method refreshes the output while downloading image.

### Version
4.2.1

### Reproduction link
[https://jsfiddle.net/xgmr7ovh/3/](https://jsfiddle.net/xgmr7ovh/3/)

### Steps to reproduce
1. The output of sunburst displayed correctly on UI which don't have a title.
2. Click on any one part of a sunburst. The output gets expanded.
3. Click on the download where we have added a title to the image.
4. While downloading, it again refreshes the output and displays the original image of the sunburst.

### What is expected?
- It should display and download the image with current state and title [without refreshing image state].
Or
- We should able to add title at the time of downloading without refresh the image data.

### What is actually happening?
- While downloading it refreshed the output and changed the state of image and downloads that image.