Thanks. I may just do that since the review just gave me the same reply after I tried to explain again.

Thanks for the clarification! But could you tell me why that will solve the issue here? I have not seen anything suggesting that the app description is the problem when searching through similar rejection cases.

Thanks for your comment! What do you mean by "uncompressed data size" and "in the app description" ? Did you mean I should show the total uncompressed assets size along with the progress bar? although I'm not sure how "uncompressed data size" matters here. If the reviewer still ignores my explanation, i will add a "disclosing the compressed asset size" UI in my next build. That is my plan for now.