The PDF template has a few limitations.
The PDF template does not support:
The field properties mentioned in Supported Field Properties Options for repeating fields.
Nested repeating fields.
Section-wise repeat. The document-repeat-elementname field is used for repeating the entire template.
Pixel control.
Data alignment in fields.
Large documents. You might experience performance issues when a document is larger than 250 MB.
To avoid these limitations, use an RTF template instead of a PDF template.