Playseat backrest uncomfortable

Hi everyone,
i'm sorry for my english (i don not know him), i'm using traslator.
I buy "Playseat Alcantara Pro" and have a problem with the backrest.
In half (where the seat is folded) there is an iron barwhich is not covered by sponge.
When I sit down and support my back at that point, it's uncomfortable.
It's normalor a piece is missing ?
Thanks for the support.
 
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