Sorry for the inconvenience caused to you. Kindly provide us the following details :
1. Version of your Acrobat/Reader.
2. Exact version of the OS you are using.
2. Does your workflow involves filling data and signing across multiple pages at the same time?
3. What are the exact steps you are following? It would be great if you could share a video of the same.
4. Does this happen with every PDF file or with some particular PDF file? It would be great if you could share the file with us.
Thanks and Regards.