Analog Output Slider Bug

In Cayenne (WEB Dashboard) I have defined a Slider Analog Output on Channel 12. I have a device connected via TTN (The Things Network LoRa WAN). When setting the slider to 0.5 I expect to get a message of: x0c x03 x00 x32 Channel 12, Analog Output, 0.50(50/100). Instead I get a message of: x0c x00 x32 xff Channel 12, Digital Input, 50 with an extra byte of xff.
Screenshot 2023-03-03 173649

This is confirmed on the TTN web control panel.
Am I doing something wrong or is this a bug?