I’ve been in contact with essential team. This was their reply:

Unfortunately, an update released by Bubble on Friday, March 21, 2025, broke dozens of PDF generation plugins. Apparently, images hosted on Bubble are no longer showing up in PDFs. We’re in contact with the Bubble team and currently investigating the issue.

In the meantime, a temporary workaround we’ve found is to add :processed with imgix’s url at the end of the image URLs sent to the PDF. In our tests, the images started showing up again.

As soon as we have updates, we’ll release a fix to the plugin.