WebXR not working with EffectComposer

hi, came across an issue when using EffectComposer in WebXR
runs fine on android device before starting an AR session.
then in AR, nothing renders.

ive stripped back the composer to a single RenderPass to isolate the issue

				composer = new EffectComposer(renderer);
				const renderPass = new RenderPass(scene, camera);

same issue on Oculus.

suspect its something to do with how render targets are handles in XR but haven’t been able to pin in down.

here is an original WebXR example with the addition of EffectComposer:

This topic is actually a duplicate of: Is it possible to use threejs postprocessing in Web VR

ok thanks, ill join the discussion on those links