Odd hmm noise (2015 CX-5 AWD)

Did both wheel bearings last summer on just my fronts. This month after 11k the noise came back it is just a odd hmm or droning noise gets worse over 40mph replaced the drivers side beating again under warranty (because the noise is gone when turning to my left) but it's still there could it be brakes or rear bearings. Had any one had the trans axle go and it make the same symptoms. Any experience would help!

2015 mazda cx5 sport awd
 
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