Hi Community and @Ismael,
The workflow is for a new electric service application.
Below are the master form and sub-forms:
1. Electric Service Application Master form
2. Electric Service Application Form (to be filled out by the customer who applying for a new electric meter)
3. Electric Service Application Review Form (to be filled out by reviewer if the application is ready for installation)
I submitted a new application with pdf attachments using the Electric Service Application Form.

When I opened the Electric Service Application Review Form (sub-form), I noticed that the pdf attachment was missing or not passed from the first form.

Is it a bug in Survey123 or I have to configure something in my forms?