I'm not sure if this will make a difference or not, but there are 2 things that I make sure of when I record with Bandicam. First off, I make sure I don't record in full screen mode, and I make sure I'm using the Direct3D rendering system (you can change these settings in the ROR configuration file, or if you're using 4.8, then it's in the game settings when you launch the game). Here are the settings I use:
Secondly, in Bandicam's settings, I record using the game recording mode option (just click the icon that looks like a controller). If that doesn't work, then I'm out of ideas