Status of the checkbox in the file generated in PDFSam is changed

[HappyPony]

= Scenario 1 =
I have:

1. saved PDF file [1] locally
2. opened it in the document viewer Evince [2] under Ubuntu [4].
3. checked a checkbox in the PDF file [1]
4. saved the file [1]
5. closed Evince
6. started PDFSam [3]
7. opened the file [1] in PDFSam
8. separated page 1 with the checked checkbox from file [1] and saved it as a separate file [1-1]
9. opened file [1-1] in Evince

Status of the checkbox is NOT checked

I can reproduce this behavior on page 1 in form [1].

= Scenario 2 =
I have then:

1. opened in the document viewer Evince [2] under Ubuntu [4]
2. checked a checkbox in the PDF file [1]
3. printed the file [1] in the "Print to file" dialog to the file [1p].
4. started PDFSam
5. opened the file [1p] in PDFSam
6. separated page 1 with the checked checkbox from file [1p] and saved it as a separate file [1p-1]
7. opened file [1p-1] in Evince [2]

Status of the checkbox is checked

= Question =
Is it a desired behavior of PDFSam in scenario 1?

= sources =
[1] https://www.deutsche-rentenversicherung.de/SharedDocs/Formulare/DE/_pdf/G0512.pdf
[2] Evince - https://en.wikipedia.org/wiki/Evince
[3] https://pdfsam.org/
[4] Ubuntu 22.04.2 LTS