Issue Summary

When exporting a specific bell emoji with native Confluence Word export utility, an error is printed instead of the icon. 

Steps to Reproduce

• Create a page
• Add a bell icon :bell: or :warning:  
• Save the page
• Export the page with the native Word export.
• This problem is reproducible by following steps 1-3 above, and then using the REST API to call the export_view via https://confluenceURL/wiki/api/v2/pages/pageID?body-format=export_view
• Same problem is observed for exclamation , star , trophy and tada . There could be more such emojis.

Expected Results

The emoji icon is printed.

Actual Results

In the output you can already see the error. For example:

<img src=3D"ht=
tps://cpandey.atlassian.net/wiki/plugins/servlet/confluence/placeholder/err=
or?i18nKey=3Deditor.placeholder.error&amp;locale=3Den_US&amp;version=3D2" t=
itle=3D"Cannot invoke &quot;String.indexOf(int)&quot; because &quot;href&qu=
ot; is null" class=3D"transform-error" data-encoded-xml=3D"%3Cac%3Aemoticon=
+ac%3Aname%3D%22bell%22+ac%3Aemoji-shortname%3D%22%3Abell%3A%22+ac%3Aemoji-=
id%3D%221f514%22+ac%3Alocal-id%3D%227f70e762-de6a-4f97-b990-37465f6bcda9%22=
+ac%3Aemoji-fallback%3D%22%F0%9F%94%94%22+%2F%3E"> 

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available