Get ALL blocks on page, including copies

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I'm using the following to get the blocks on a page:
$c = \Page::getCurrentPage();
$blocks = $c->getBlocks();

However, it's only returning the 'generic' blocks; ie, if I copy-and-paste a block (such that the copy has the same bID as the original), this code only returns the original instance of the block.

Is there any way I can get ALL the visible blocks (including copies) on the page?

Gondwana