When printing to PDF in Qlik Sense server, it exports all of the features, extensions and values to the file, with no difference in visualization.
However, when the same app is in the cloud, and I download as PDF, the visualization is limited, some buttons are blank and missing fields.
I looked for this issue in the community, and found that there are some limitations when exporting in the Cloud, comparing to the server app.
I also found that this is an idea in progress to improve export PDF in the cloud: Sneak peak of reporting improvements on Qlik Cloud - Qlik Community - 1922236
It'd be a great idea if the funcionality matches both versions of the product, so we can work on the cloud without any limitations, like we do on the server.
Just for the matter of comparison, see screenshots attached of the same app downloaded as PDF in the Cloud, and in the server.
