Some marks appearing on PDF after adding annotations - iPad Pro

[Alrodca]

Hi to all!

I use Acrobar Reader with my iPad for all my PDF files. Lately I realiced about the following issue. When I add a handwritting note or just highlighting the document, I see some marks on my PDF document. I upload a picture where you can see this marks. 

Any idea what can I do?

It looks that this marks or boxes appears every time that i add some comments or hignlighter to the file. 

[Title renamed by moderator]

[MeenakshiNegi]

Hi Alrodca,

As you have mentioned above, there are some marks appears on the PDF after adding the highlighters or comments.

- Is it an issue with a particular PDF? If yes, please confirm if it is a scanned PDF.

- Did you check if the similar issue occurs with any other document?

- Would it be possible to share the PDF with us? We would like to check it on our end. To share a file, use the steps provided here https://forums.adobe.com/docs/DOC-7161

- Also, share the application and OS version on your device.

Let us know if you need any help.

Regards,

Meenakshi