Don't always trust press releases in 100%, remember that they write what's good for them.
Propshafts are under high stress in those cars, like Mirek wrote, but that was not an issue in this case.
In Fiesta it's not happening (propshaft is based on standard part) in PSA cars also not an issue if everything aligned well (and propshaft there completely custom part - straight big diameter pipe without any joints)

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