Hi,

I've heard of this happening on a number of occasions and luckily there are two ways to fix it!

One way is to create a cache of all the simulation data so that when it batch renders, it just takes the info straight out of the cache.

To do this:

From the Dynamics Menu Set, go to Solvers > Rigid Body Solver, and under the 'Rigid Solver States' section, tick the Cache Data button.

Now if you play your scene through once, it will record all the information onto the hard drive. You'll now be able to scrub back and forth on your timeslider and the dynamics will update instantly (in reverse too!).

The other option to fix it is to bake all your dynamics into keyframes, by selecting your dynamic objects and going to Edit > Keys > Bake Simulation.

That will put a keyframe on every frame for each of your selected objects.

I hope that fixes it for you!