Reproduce

• Deploy a process with a user task without a form, so it uses generic forms
• Start the process with a business key (see start-process.png)
• Look a the task form (see taskform.png)

Issue

• In the task form (taskform.png) a business key field is shown, which is:
  • empty
  • writeable

Expected

• In 7.4 there was no business key field
• If the business key should be displayed it should actually be filled but also be read-only