Squeaky wheel bearing

So I was told that I needed to replace a wheel bearing (front left) last year to pass inspection and so I had it replaced at a local shop. From that day on it has squeaked after driving for a few minutes- almost as if it starts after the metal gets hot. It sounds as if something is hitting with each rotation, but the sound goes away when I hit my brakes, and comes back when I let go of them. I took it back to the shop multiple times and they said they could not find the problem, nor replicate it. I have replaced the brake pads and that did not remedy it. Any one else ever have a similar problem, or does anyone have any ideas on a remedy? PS- turning the radio up Is no longer cutting it. TIA

 

bump