Not freeing CPU usage after termination, will max out computer's CPU

Environment
Provide version numbers for the following components (information can be retrieved by running tns info in your project folder or by inspecting the package.json of the project):

• CLI: 5.2.0
• Cross-platform modules: 5.1.2
• Android Runtime: 5.1.0
• iOS Runtime: 5.1.0

Describe the bug
Every time I rerun 'tns run' the previous CPU usage is not freed, but instead compounds. I often terminate the process by Ctrl+C, and each time I do this the free CPU goes down by ~10% and with 6-7 runs my Macbook is completely useless and I have to restart to get my CPU back. I cannot terminate processes to free it. Here is a sped up video showing my problem. https://www.youtube.com/watch?v=L_27UGBeOgA I downloaded an example template to show this happens with every project. I run the project 7 times in the video and each time I do it you can see my CPU slowly get maxed out. This only started happening after I upgraded to 5.2.0 from 5.1.0. This has completely brought my development to a standstill.