Hi @korina,
Thanks for continuing to look into this issue.
If this is in fact the correct behaviour, why is it that the data from both overlapping sources is in fact displayed correctly in the overlapping region in the first frame? It is only in the second frame, when the Environment Canada data in the non-overlapping regions becomes hatched, that the EC data in the overlapping region disappears.
It is this inconsistency in the behaviour of the overlapping data that was leading me to believe that this issue is bug and not the intended behaviour.
Cheers,
Chris