Disappearing Text From Whiteboard

Hi Community Friends,

Twice today I've had text disappear from one of my completed templates.  I'm attaching a png of a before and after shot that clearly shows what happened.  I'm a bit disappointed and hoping this doesn't continue to happen.  Is this happening to anybody else?  Is there a fix or maybe a way to prevent it that I'm not aware of?

Blessings,

Melissa