“Mobile device support” disabled whenever I change “Caching”

Great plugin!

When I change the value of “Caching” (from “On” to “Off”, or vice versa), most of my settings on the Advanced tab remain checked. However, “Mobile device support” always unchecks itself. In other words, $wp_cache_mobile_enabled = 1; gets set to $wp_cache_mobile_enabled = 0; in /wp-content/wp-cache-config.php

Any idea how to stop “Mobile device support” from being automatically disabled?

Thank you