Over the years I have owned 9 taillights that turned off over a bump. Thanks to the forums I know the Radbot 1000 could do this too.
I fixed four of my old bump shut off lights. One thing they had in common was that the batteries bounced and lost contact for just a fraction of a second. I put foam under the spring coils that held the battery to strengthen the springs on some, but most had batteries that with just a couple of wraps of tape, would be a tight fit in place and would not bounce anymore.

Right out of the box if I smacked my new radbot against the heel of one hand I could get it to shut off. So.............
There is a thin wall on one half of the radbot that goes across the middle of the batteries when the two halves of the light are screwed together. I cut a small section of a thin road bike tube and put it across the batteries where the wall hits the batteries to pinch them very tightly when the light is assembled. I have not been able to get the light to go off by hitting it, but I have not used it on a bike yet. I will try it tomorrow on a bike with 23mm 130 psi tires. Maybe it is fixed but I really need to put some miles on it to be sure.