Text Size on copied slides

One thing I’m noticing is a formatting issue with a certain PPT files when I copy slides from one presentation to a new ppt file using the component, the text appears larger on certain slides and it does seem somewhat random. Are you aware of this as an issue or is there possibly an explanation

I can provide file samples if they would be helpful in displaying my point

thanks

Dear Rodnex,

Any samples would be very helpful. Thank you.