Being a ‘Yank’ I can only assume that the front ‘bogie’ is the front truck of your locomotive. I’ve had similar issues with my steam locomotives (N gauge) and my solution was to place either a small weight on the ‘top’ of the truck (a couple metal washers glued in place usually did the trick) OR mount a small weak coil spring between the top of the truck and the underside of the engine’s body. The coil spring would provide a gentle downward pressure that would minimize the derailments you describe or using the metal weights instead would essentially produce the same effect. You might have to experiment a bit to make sure you don’t over do it with either approach.

Hope this helps,

Geof