Hi everyone. Hope you are staying cool!
My question is: I’m running a C8, updated to latest version. All of my water sensors are grouped with life safety sensors in a room called “security,” but the only thing that shows in the new app when I look at devices by room is my Aeotec siren. Smoke detectors, CO detectors, and water detectors are all missing.
That said, I can add them to dashboards.
Is there a fix for this or something I’m doing wrong?
As always, thanks so much 
You didn't say if you're using the iOS or Android app - appears to be iOS but not 100% sure as I haven't seen the new app on a tablet.
Regarding your question, the previous version of the mobile apps, along w/the new versions, do not display leak sensors on the Devices tab. You can, as you've noted see them in a dashboard in the mobile app. The Devices tab has been focused on bulbs, switches/dimmers, and plugs, things you may need to turn on/off, set dim level.
So not a bug, it's the current design of the apps. That might change in the future but for now no leak sensors on the Device tab.
There is a Mobile Apps category where you can post questions/comments about the mobile apps - more likely to be seen by the appropriate HE personnel in that category.
Not all devices are currently supported by the Devices page in the new mobile app.
For more details on supported devices please check out this document: Mobile App | Hubitat Documentation
