When I drag an image file from the asset manager to a bloc as background image the canvas stays white. it shows in the preview thumb and in the preview window. when I close the project and reopen it, the image shows.
I deleted and reinstalled blocs but the problem remains: When I choose a picture file from the asset manager i only get a blank space where the file should appear.
I close the project, open it again: the picture appears on the page.
If you are using linked assets and your Mac has multiple HDs you may get this issue. Assets need to be loaded from the same HD as the OS is installed on.
The best workflow for working between devices such as Macs and iPads is to embed the assets or link to them on a hosted server.
If you are working on a single device you can use a linked asset workflow if that best suits your needs but its recommended you use the Master HD for the assets/projects rather than an external one as this can create broken resources links when the HD is detached or renamed etc.