Pasting on freeform

Hi. So I just got my new iPad Air, and I came across this question when I was trying to transfer my hand written notes in the Memo app to Freeform, I did this by copying the hand written scribbles then paste in Freeform paragraph by paragraph so that I could rearrange the whole thing as how I wanted it to be. It went on well until something weird happened. The first few paragraphs were pasted as .png, and all the scribbles were shown clearly. But the next paragraph was pasted as a weird format end by .drawing, and no content was shown but a frame and a tiny icon. The contents belong in the same memo and I tried a million times yet it’s still the same result. Can somebody tell me how to fix this? Thanks in advance.