Roadmap Planner throws a java exception in view mode

Roadmap Planner macro containing an image in the title of the linked page or emoji in the name of the bar throws a java exception in view mode.

Environment

Confluence cloud

Steps to Reproduce

1. Create a page with title having images (for example 📊💡)
2. On another page, insert a Roadmap Planner macro and in Link Page option link the page created in the first step.
3. Now publish the macro and in the view mode, it shows Error rendering macro 'roadmap' : java.io.IOException: Invalid character.
4. Now remove the above linked page and add an emoji in the name of the macro bar. Publishing the page shows java exception error message.

Expected Results

Macro content should be displayed when images, emojis are used in the content of the macro

Actual Results

Macro content is not displayed in the view mode and throws an exception.

Workaround

The workaround is to delete images, emojis added in the macro.

Note: Splunk logs

Error rendering macro: roadmap
java.lang.RuntimeException: java.io.IOException: Invalid character
com.atlassian.plugins.roadmap.RoadmapMacro.execute(RoadmapMacro.java:104)
com.atlassian.confluence.macro.Macro.execute(Macro.java:33)
sun.reflect.GeneratedMethodAccessor1674.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)