Electronic Stability Control Related Problems of the 2008 Toyota Tacoma

Electronic Stability Control problem

I have owned a 08 Tacoma for about 4 years now, and have noticed a possible problem with the Toyota abs system. If when braking you hit a bump, pot hole, object, etc the abs system does not know exactly how to react and increases braking distance. I live in louisiana and our roads are not the best. I have noticed several times that I will be braking to avoid hitting something/someone, hit a bump, and my braking action is reduced until the system regains itself. You can hear the abs system respond each time this occurs and can notice that your vehicle isn't stopping. Like I stated before I've owned this truck for 4 years and have noticed this the entire time. I recently have had a few times to where the truck has not wanted to stop and I have almost hit someone because I started braking, hit a bump, and the system did not know how to react. This is a potentially dangerous situation that I would like fixed. I'm a loyal Toyota owner (have 4) and just want this issue addressed so that I don't have to worry about braking and hitting bumps. My vehicle was checked out my Toyota and everything was good with them. I contact Toyota about this issue and they stated that if the dealership says there's no problem, then there's no problem, but I could have problem fixed and they may reimburse me in the future. I've spoken with other owners and they have the same problems with similar years and models including 4runner. The abs system doesn't react like I feel it should when the tire's dynamic changes due to either a dump and/or going from hard surface to a soft surface such as dirt, if the brakes are applied before and through the change in dynamic. I have a particular bump in the road right before a turn that every time I hit it while braking to make the turn my abs pump surges, steering wheel vibrates, and braking is very limited until system regains itself.