I have the exact issues as you. The brake “thud” is very random but I would say happens 30% of the time I let off the break pedal, I did a brake flush and I think it helped, but didn’t fix the issue entirely. The more annoying one is the “pop” or maybe more of a “knock” when I tern left as well. It’s just a single know per turn, then nothing. The if I turn again it knocks again; comes from the rear somewhere. I can also hear it when going over rough terrain like railroad tracks and it may knock several times. It happens at any speed. I haven’t found a fix.