Content added after PlantUML Macro is deleted when saving the page from WYSIWYG editor

Steps to reproduce:

1. Install PlantUML Macro 2.0.2
2. Create a new page
3. Edit the page in WYSIWYG mode
4. Create a schema using the PlantUML Macro 
5. Insert new paragraph by clicking on the dedicated macro icon -> 1.png
6. Add some text content on the new created paragraph after the PlantUML macro
7. Save & View : the both text (before and after Macro) are properly displayed inside CKEditor. -> 2.png 
8. Go back to the WYSIWYG edit mode: the text after is displayed inside the Macro -> 3.png
9. Save & View: the text after the PlantUML Macro has disappeared -> 4.png
10. Edit the page and check both views (WYSIWYG & Source): the text after is not displayed -> 5.png + 6.png

Expect behavior: The Diagram created with PlantUML Macro and the both text (before and after Macro) are properly displayed

Actual behavior:  the text insert after the PlantUML MAcro is completely removed after edition

Tested on Linux, Firefox 90, XWiki Jetty 12.10.8, 13.4.2.