Unreal Flipbook animation loop back to start not smooth

I created a fire animation in Houdini using Pyro FX and rendered it out as a Flipbook and loaded it into to Unreal using the flipbook node. It came out looking great other than when it loops back to the beginning you can clearly tell that it has started over. Is there a way to edit the animation so that it has a more seamless loop in the animation?

Usually, Flipbooks loop perfect, if the frames themselfes are made for looping (as in, the end frames transition seamless to the start frames). Do your frames/flipbook loop perfect in Houdini?