Volume of co driver voice is too low

Product: EA SPORTS™ WRC
Platform:Steam-PC
Summarize your bug The volume or loudness of the co-drivers voice in cockpit view is too low to hear.
How often does the bug occur? Often (50% - 99%)
Steps: How can we find the bug ourselves? Drive any car any stage, at some point the co-drivers voice will be swamped by the other noises in the car.
What happens when the bug occurs? Because I can't hear or make out the call i crash or go off the road.
What do you expect to see? The co-drivers voice should be louder or clearer, also I would expect to be able to turn down engine and effects noises to zero but I can't they only go down as far as 50 which is too loud and washes out the all important co-driver call.

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This is happening too many times.