Next-gen roadmap export image on Safari and Chrome fails to generate image

Issue Summary

Exporting Jira roadmap doesn't work on Safari and Chrome browsers if the roadmap has complex dependencies lines drawn on issues.

Steps to Reproduce

1. Setup a Jira roadmap project with complex dependencies, for example link an issue to multiple issues.
2. Click on "Export".
3. Export modal pops up and generate image from roadmap.

Expected Results

Image successfully generated.

Actual Results

See spinner spinning with no image generated.

Workaround

Export in another browser e.g Firefox.