Instructions added to a workflow disappear

  Current Behavior:

• A newly added instruction disappears when the workflow is extended and then deployed or refreshed.{}

Steps to reproduce:

• Import the attached zip (1 Workflow and 4 Resource Locks)
• Add an "if" block instruction and a Job inside the nested if. The workflow is displayed as valid.
• Refresh it then the "if" instruction and the Job inside the "if" have vanished.
• The JSON still has the Job, but the "if" instruction is missing.

Desired Behavior:

• Newly added instructions should not disappear in case that an existing workflow is extended.