Just to be sure, after you copied an existing device did you open the copied device and change the X10 address on the X10 tab and click the Done button? If you don't do this then the plugin cannot update the internal data structures and might lead to the issue you are seeing.
I'll test copying an existing X10 device in HS4 before publishing a new beta.
Thank you for your offer to help test!
I'll test copying an existing X10 device in HS4 before publishing a new beta.
Thank you for your offer to help test!
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