Not able to change colours in Roadmap Planner macro

Summary

When using the roadmap planner on a page on Confluence the user is not able to change the colours of the roadmap planners boards.

Steps to Reproduce

1. Add Roadmap planner macro to a page
2. Edit the page
3. Edit the macro Roadmap Planner
4. Click on the left side on the board where says "Lane1" or "Lane2"
5. Try to change the colour

Expected Results

More colours should appear to change the colour of the board

Actual Results

The dropdown menu with the colours does not appear

Notes

This was reproduce on Cloud instances with confluence version 1000.32.0
You can take a look on my test instance to reproduce the issue: https://pece.atlassian.net/wiki/display/CR/Code%3A+Veronica

Workaround

None so far.