In the new release of Illustrator 2020 (version 24.2), Adobe has introduced the "Save to cloud documents" feature. Unfortunately, there is a known issue that affects how Illustrator documents with MAPublisher referencing and attributes get saved to the cloud. If you update to Adobe Illustrator 24.2, and are using it with MAPublisher 10.6.0 please be aware that it will not properly save the necessary information to keep your attributes and referenced data. One of the key pieces of metadata is not being sent to the cloud properly.
The workaround for this is to save your project locally first. The first time that a document is saved to the cloud, the metadata is not sent. However, if you open an existing cloud document it will correctly send the data to the cloud. We have addressed this issue in MAPublisher 10.6.1. Please click here: https://www.avenza.com/download/mapublisher/ to download this update.
If you have any issues or questions don't hesitate to contact our support team.