Chrome Keeping Screen On

[pjwk81]

Anyone else having this issue? I've tried 3 different apps and the phone times out and locks ok, but I've tried 3 different web pages in Chrome and they all kept the phone awake indefinitely.

Pixel thing? Chrome thing? Oreo thing? I've only noticed it since the new Nov patch this morning. Chrome is version 62.0.3202.84.