Automatic Primary and Secondary Axes in LibreOffice CALC

Good morning,
I am creating line graphs with LibreOffice.
I set the intervals between the dates to be graphed,
save the file but when I reopen it the intervals have taken the automatic value.
If I correct them save the file and reopen it, they return to automatic values.
How can I disable this function? Thank you.

maybe attach an example ?

Save as .ods.
EDIT:

  • Thanks for sharing the sample file with detailed informatioin.
  • I tested with a new file, and it seems to be a bug. I didn’t find a bug reported yet (https://bugs.documentfoundation.org/).
  • Please, don’t use answers to share a sample. You can edit your question and use the upload icon, instead.
    imagen