When editing a block with nested blocks, and you want to choose a subblock to edit, the selected subblock should be indicated in the list of blocks within the head block.
In the image below, the head block includes all the window module blocks
dont dream that this will be done. just check block plugin from food4rhino which brings block functionality to the lebel where it shoild have been natively by now.
It looks like there is a problem with the plugin - it doesn’t like bad objects in blocks and delete them from the block.
It looks like that I have some bad objects in my blocks and never got a problem with them. I need my scenes for rendering only and anything was fine looking. But Block Edit New shows a warning and remove the objects.
Only it helps to undo the block edit, explode the block, repair the bad objects, Copy it to memory per Ctrl-C, undo before block explode and add the repaired object to the block per Ctrl-V. Strange.