Have both canvas' buttons and Vuforia video canvas' button working in the same scene?

Hello!

I have a Vuforia Image target that displays a 3D model of a billboard with a video. I'm using Vuforia's Core Samples scenes to play and pause my video and it works fine.

However, I added a canvas to display a yellow back button to allow the user to move back to the main menu scene and it works BUT it disables the video's play button, I cannot longer play the video when I have this canvas.

Could someone please help me debug this? I get no errors in the console either. I'm working with Unity version 2018.3.14f1 and using Vuforia Core Samples from Unity Asset Store. A single video has its own canvas that holds it's play button and progress bar so I don't know if there's a conflict in having different canvas. I also test having multiple videos using the same image target and each video plays just fine. In the picture below I'm showing the objects I have under the Video-PreHistoricFL and the Canvas that hold the yellow back button. I'm new to Unity and Vuforia so any help will be appreciated!