Hello Aframe community !

with https://aframe.io/examples/showcase/sky/ or https://ribbon-shear.glitch.me/ when switching to VR mode with chrome on android I get a black screen, no video or image displayed. No luck with console, no error displayed.

• A-Frame Version: 1.0.0 (Date 2019-12-14, Commit #dc7d6174)
• Platform / Device:
  Android Chrome 79 : pixel 2
  Android Chrome 79 : galaxy s 7
  Android Chrome 79 : note 4
• Reproducible Code Snippet or URL:
  https://aframe.io/examples/showcase/sky/
  https://ribbon-shear.glitch.me/