Just to add to the thread here as a kind of work around. And for the record, in some cases I love making clipping paths in photoshop to create transparent areas or close crops for assets in layout. So yes, disappointed to find these paths not recognized in Affinity. Weirdly, however, after placing a clipped image (TIFF) in indesign, I can copy it from indd and paste it into afpub and the clipped areas are transparent! I don't have access to the path anymore but the it seems to work. Haven't tried to print this yet, and worry about the edges, but interesting... (Perhaps if the clipping mask is made in Affinity Photo...?)