Timeline AD & briefcard enabled shows code instead of text

UNA 13.1.0 - hosted by UNA / cloud

I wonder if somone can confirm this funny brief card happening.

• Post an AD and limit the characters both to 200
• Set Timline briefcard DISABLED
• looks as it should

• now ENABLE briefcards in timline/settings
• here the result
• 
• Is this a known issue? Somebody who can reproduce it?