i read that all the animations in the engine are set in 30 fps (the default sample rate), and the engine itself interpolate to 60ps, 120fps or the frame rate thats he need for the target device. And crop if need to downgrade the sample rate (for mobile, low end devices,etc). Its an engine automatic thing. We dont be worried to make the animations in 120fps, we need to make them in 30fps and every will work fine (or if we are doing in more fps, check the “use default sample rate” to prevent problems like this, have a huge keys and animantion size in kb). if im wrong please correct me