Data Assignment gets disordered when property value includes commas in jBPM5 Web Designer

Issue

Steps to reproduce:

• Create a simple process, with just one human task
• In the task comment enter something with a comma in it like
  "This is comment line 1, and this is comment line 2"
• Validate and save the process
• Reopen the process
• Try to save it again.

The following error will be displayed:
Unable to perform user action due to error(s).
Validate your process before saving, and view server logs to see error details.