I found that the freeze often happens once MMA or MMW deletes a file on the device and the device is connected just for a few seconds.
I am also able to simulate the freeze without involving MMA/MMW.
KDE: To set the CDDB preferences used by various KDE applications, open System Settings, select the Advanced tab, and double click on CDDB Retrieval.
Make sure that you have checked Enable Music Brainz lookup so that Music Brainz is used directly if possible; then set the Freedb server to freedb.(the other settings default values are fine).
To use the Music Brainz Free DB server, you must reinstall EAC and deselect the "Metadata Plugin" component in the installer.) Network (Proxy & Free DB).