When applyReferencePictureListBasedMarking() is looking for longterm reference picture it doesn't check if picture belongs to the same layer.
Also it needs to check if picture is already reconstructed (otherwise it may "find" itself)
When checkCRA() iterates over reference pictures in RPL it needs to be aware of inter-layer reference pictures.
ILRP entries can be in the beginning or in the middle of RPL.