Jira Macro adds content instead of replacing it on each props save (in-place editor)

XWiki 16.10.9

While editing a page (verified with the in-place editor), add the Jira Macro and repeatedly edit its properties to switch from enum, table, etc.

Instead of having the macro content replaced, it is subsequently added to the page, yielding to the jira issue fields repeated:

The same happens by just opening the macro props and saving, without changing any field.