I've been finding this too and it seems to be because of Smart Suggestions (at least that's been the case for me). Fixing it in device care didn't do anything so I went into Apps -> Filter -> Show System Apps -> Smart Suggestions and just disabled the app for now and it seems to have improved the battery drain a bit. Hoping they fix it with the next beta as I've found the Smart Suggestions stuff really handy
I've noticed this too on beta 2. I am having to charge more than once for a similar usage I used to do on my phone but the battery seems to drain faster!! Argh!!