1) When you modify the text of a new "actualité", there is a display problem when you select the "Important" style and then a "Frise chronologique" type list : 

2) When you save the text, the display probem is still showing

> How to reproduce the bugs

• Write 3 lines with line break between each (like the screenshot above)
• Select them all
• Apply the "Important" style
• Apply the "Frise Chronologique" style
• Save and check the result