Abus U Lock

I've mounted an Abus Granit X-Plus https://www.amazon.co.uk/gp/product/B00 ... UTF8&psc=1 on the frame of a Cube SL Road Pro.
It's a sturdy lock and mount but it rattles where the shackle slots in to the crossbar of the lock.
There doesn't seem to be a fix for this.
Is this normal? Has anyone had the same problem?
I can only find glowing reviews online and no mention of this issue.
Thanks in advance.
It's a sturdy lock and mount but it rattles where the shackle slots in to the crossbar of the lock.
There doesn't seem to be a fix for this.
Is this normal? Has anyone had the same problem?
I can only find glowing reviews online and no mention of this issue.
Thanks in advance.
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