I only get a white canvas in chrome canary when opening webgpu apps

Since a few days I only get a white canvas when I try to open webgpu apps with chrome canary or chrome dev. Firefox nightly is able to open webgpu apps, but runs very unstable.
chrome canary was very good, i had no problems with it. I still don’t understand why I suddenly only get a white canvas. Unfortunately I don’t see the console on my tablet. That makes it doubly difficult to understand why it hasn’t worked for a few days. Does anyone know the phenomenon?