It persists through the reinstall because its most likely a DTH problem related to the way the device responds to the updates to device health. (one of the big changes to new platform - device health expects certain responses that have to be handled properly in the DTH and if it doesn’t the platform marks the device offline) I haven’t worked out exactly how the device handler interacts with Alexa but these have a history of issues with the app side of the platform: Jasco 45705 Offline but Working - Devices & Integrations - SmartThings Community
What happens if you change the device type in the IDE to ZWave Switch? (Works for almost all basic Jasco devices)