Hi @Paul_Lowman ---- Thank you for the follow up and sharing your observations with me. So despite leaving the iMac in an active state Roon crashed regardless, correct? Although it sounds less in frequency based on your feedback. If this behavior is reproducible I would definitely like to grab some logs from you.
Furthermore, how are you performing wake on LAN? I know some of our users have reported positive experiences using applications like Fling (more info here).
-Eric