It sounds like this has been brought up many times before, but this is almost a show stopper for us.
We really need a way to mirror subitems - or be able to put a board in two locations at once as a whole.
I was busy mirroring boards and then realized the subitems were not there! What use is it, then?
Agreed! This would be absolutely crucial for our workflow. Please add this feature! 
+1 can we please get this? The current feature with mirroring subitems with other tasks is kind of useless. Would like to be able to mirror subitems across boards instead
This would be a game changer for us. Linking master items to sub items across different boards is critical.
Agreed! This would be highly beneficial to my team’s workflow as well.
Hi everyone,
Hope everyone is doing well.
One of my colleagues find a workaround here :
He was able to link the sub items to a main item in another board.
Hope this helps,
Cheers,
Aminat.
In the same boat. Asana does this seamlessly so it’s incredibly frustrating after going through all the effort of setting up mirroring to realise that subitems screw up the workflow. Unfortunately the workaround doesn’t work for our workflow either as I’m using a board to mirror tasks assigned to me from 4 other boards which change frequently.
This would be very helpful for my daily work. If someone got other solutions please let me know!