I had to manually create the responder links in the ALDB. Tedious. But works. Use the insteon integration ALDB panel. On the PLM side create 7 responder entries, groups 2-8, pointing at the address of the device (e.g. 4D.32.8C), with data 0 0 0. On the device side, create 7 controller entities, groups 2-8, pointing at the address of the PLM (e.g., 49.F8.0E) with data 3 21 158
If you use the “Create Default Links” button in the All-Link Database tab of the device, this will create the correct responder / controller links to ensure all buttons are seen correctly.