Front end problems

Old fluid hoses do that also. Flow becomes sort of like a check valve in that higher pressure fluid will flow one way, free flow doesn't go the other way. That or anything else at a front side would effect straight line stopping. First be absolutely sure the fault is at front brakes. If I knew for sure your car is 100% OEM parts, my suspicion would be a bad master cylinder. Knowing how much aftermarket stuff has been installed, aftermarket adjustable proportion valve could be the fault.