A-Frame-example | Frame example showing the reconstructed facade | Augmented Reality library

I wrote a custom shader for Conway's Game of Life, using three.js and A-Frame, which does all processing in the fragment shader. It works perfectly in a web browser on desktop. It also appears to work in the Quest browser, but when entering VR mode, the entire screen begins to flicker between the scene and a black screen.

I suspect that the problem is with the RenderTarget settings, or the way in which I switch between render targets, but I am not sure. The relevant code occurs within an A-Frame component tick function, which periodically switches between two render targets and back to the main scene as follows: