PDFViewer with DPL Processing does not load the PDF file correctly

[kendo-bot]

Bug report

When loading a PDF file using the PDFViewer configured for DPL processing, the file content is loaded partially.

Reproduction of the problem

1. Open the DPL Processing Demo: https://demos.telerik.com/aspnet-core/pdfviewer/dpl-processing

2. The file content is not loaded as expected.

The issue started to occur in version 2025.1.211. When comparing the responses of the "pdfviewer/getinitialpdf?pageNumber=1" request, the response when using the previous version (2024.4.1112) is longer than that of version 2025.1.211.

Expected/desired behavior

The content of the loaded PDF file must be complete.

Environment

• **Telerik UI for ASP.NET Core version 2025.1.211
• **Browser: [all]