the LatencyMon reports show that your computer has a problem in being able to provide consistent performance. I regret that the cause of this is not within our scope of support for your Pioneer DJ product as the hardware, software, and drivers are not the cause of this problem. rekordbox becomes unstable because your system is otherwise occupied with tasks that are not providing it with the resources it requires to function properly.
I'm going to recommend that you seek further assistance from the community here where they can help identify the causes of these issues.
Thank you for your understanding.