When a RME job is created for an existing job for remote execution. When it's submitted from source master as R:jobname with some of the prompts as blank i.e. xml prompts on OAE job. I found on target master that null values are pushed for that execution of job.
When submitting an RME job, if the radio button to use default module prompts is set to "None" or "No" then a value of NULL will be passed for any prompts with a blank value.
In regards to the customer's current issue with NULL values being passed to blank prompts. The customer should use the "Yes" option for use default module prompts.