1.4 playback issues with WD TV Live

Since upgrading to 1.4 I have had playback issues with AVI & MP4. Both hang during playback intermittently. This did not happen with these same file types on the same WD TV Live box with Serviio 1.3. I have tried 2 versions of the firmware for the WD TV Live. Both the old & new have the same issue although the behavior isn't the same. I have also noticed the Resume playback of AVIs often fails. It plays what is buffered and then hangs.