ADDITIONAL SYSTEM INFORMATION :
Windows 10 1803, jdk1.8.0_191, Eclipse Neon 4.6

A DESCRIPTION OF THE PROBLEM :
When a file including a base 64 encoded image is edited with HTMLEditor and a newline is added right before the image, artifacts of the image remain in the previous location of the image.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Open a file with a base64 encoded embedded image using the HTMLEditor. Move the cursor just before the image. Press the return/enter button.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The image moves down one line.
ACTUAL -
The image moves down one line, but an artifact of the image remains in the previous position and can still be seen in the editor.

CUSTOMER SUBMITTED WORKAROUND :
The artifact can be removed by pressing enter several more times and then pressing backspace.

FREQUENCY : always