I have a Cm15pro connected by USB to a raspberry pi running r375. When the rpi reboots the X10 device becomes unselected. When I select the correct port my X10 modules fail to respond.
To overcome the issue I disable & reenable x10 but after this my X10 modules become unconfigured. I need to restore a backup configuration to fix my settings.
This issue has affected my setup a few weeks now, going back maybe 3 or 4 releases.