Awesome! Glad to hear you'll be addressing this with some options. As far as this happening, it's been consistently close to the edges, but I had just rearranged my living room to increase my play area (specifically for your game, haha!), and I guess I pushed the boundaries really right up to the edge.
For Oculus, there seems to be two play areas; one is the actual area you map out, irregularities and all, and the other is the largest rectangular area that the system can fit inside the irregular shape. The floor inside your main menu maps to the rectangular "sub-area" it seems. I made manual adjustments using Guardian Boundary Editor, and I may have moved the rectangular area too close to the actual guardian boundary. So I wouldn't blame your game entirely for the mishap as I may need to make more adjustments, but you can definitely see the overlap in the video is a bit too much regardless.