1. Created new instance of PowerPoint presentation.
2. Added new slide with blank type to the presentation.
3. Added a shape with text to the slide.
4. Saved the PowerPoint presentation.
If still issue occurs in your end, we suspect that the problem might be due to code snippet used at your end. So, could you please provide us the code snippet which used at your end to reproduce the problem. Thereby we will analyze further and provide you the appropriate solution at the earliest.
Please let us know if you have any queries.
Regards,
Vijayasurya A