Dear Jessica James3,
Good day. Thank you for posting to Microsoft Community.
Based on the information you provided, I tested it on my side, and it seems correctly for me. I can’t reproduce the scenario you said.
To narrow down the issue and focus on the specific scenario you encountered, could you provide me some information below?
- Could you tell me which version of PowerPoint do you use? Please provide me the screenshot about it. File > Account and capture the screenshot of the product information.
- Do you have the same issue on other presentations?
- Do your colleagues have the same issue?
At the same time, please repair your Office application and check if it works correctly for you.
Reference: Repair an Office application - Microsoft Support
I searched the similar situation in this forum and found a thread you could refer to: How to keep slide formatting when copying between ppt presentations? - Microsoft Community.
Thank you for your patience and understanding.
Sincerely,
Claire | Microsoft Community Moderator