Modifiers Not Rendering Properly?

[Trumble]

I'm using bend and FFD modifiers to make a hose bend as it comes out of one pipeline into another. They are animated to have the hose going from basically straight to a rounded 45 degree angle. In Max, every once in a while I have to turn the modifier on and off for it to "refresh" properly otherwise the geometry looks like there is no modifier added/animated. It does this in the view port and in my renders. But if I turn them on/off then they'll render fine. It's totally random and there doesn't appear to be any "reason" for it?

 

Any thoughts?

[Trumble]

So it seems that adding a simple edit poly on top of the stack solved the problem. Gotta love trial and error!