When working with documents that have multiple artboards in AF Photo some problems arise:
Drawing outside of the artboard is possible, which does not feel intentional (as opposed to preserving pixel data when moving or scaling it outside of the bounds of the artboard, that works as expected).
Selecting via Ctrl+A or the Wand tool only works as long as the artboard was not moved from it's automatically generated initial position. When Moved away from that initial position only the parts that still overlap with the initial artboard bounds are selected.
There might be more problems I'm not aware of but these are the ones I stumbled over.