Did you try going into the integration app and clicking refresh to see if that updates the IP on the device entry? Also, could try rebooting the hub.
Or possibly Configure, Refresh or Set Token on the device page will work to get it to refresh the IP? For Set Token you should be able to just copy and paste it from below.
As a last resort you could use this app to edit the "data" where the IP is saved on the main device entry. [RELEASE] Custom Device Note App
The app is designed to add custom notes to the data but I think you can use it to edit/replace any of the data on the device, you just have to provide the name of the data entry "deviceIP".
You want to edit the deviceIP:
