Adobe Bridge/Photoshop doesn’t remember the folder path in Camera RAW Cache Settings in Camera RAW Preferences window. Every time when I want to set my own folder Camera Raw Cache and its maximum size, I click OK and return to Camera RAW Preferences, I see default path (C:/Users/Name/AppData/Local/Adobe/CameraRaw/Cache/) and maximum size as 1GB.
I delete folder "C:\Users\USERNAME\AppData\Roaming\Adobe\CameraRaw\". Then I start Lightroom and I pick my own folder in Camera Raw Cache Settings, set 20GB size and click OK. Now everything works fine. Bridge and PS also fine.