That's the same issue as with any such pan & scroll effects, commonly found on the Internet under the subject heading "stuttering/ jittering credit roll" and the solutions to rectify the issues. The fixes are the same - adjust the timing to be equal multiples of the frame rate, add motion blur, add additional directional blurs, use faster and more dynamic motions. Again, look up those credit roll tutorials. Even here on this forum people like @Rick Gerard have explained the reasons and necessary interventions several times. Looking up their posts alone can provide valuable insights.