Sharepoint document library custom properties are cleared on file upload

Question

I have a Document Library with custom properties: Internal id, customer id, etc. Those properties are not standar names like Title as we know those are sometimes populated by Sharepoint. The properties are also not present on the documents. To be more specific, they have names like AttachmentId, RUT, Empresa

1. First we create an empty placeholder with the custom ptoperties. I confirm custom properties are applied by checking the library.
2. When I upload documents using REST API the document is uploaded properly.
3. But when the document has those properties, even empty, they are replaced by the document ones!

Properties updated

File content uploaded

Same process with another pptx before uploading data

Custom properties cleared!

I understand this is the expected behaviour. However, how can I exclude those properties from being updated/overwritten automatically by SharePoint?

I want all my custom properties to stay in place. Is there a way to tell SharePoint to ignore those?