Fix,
If you are not using any AMP, the only thing that you need to do is Enable both Groups (High and low), and select the theme that you are using in the dropdown menu to ensure that a unique cache is created for each user agent group. Drag and drop groups into order (if needed) to determine their priority (top -> down).
Source: https://wordpress.org/support/topic/mobile-desktop-cache-get-mixed-up/