You probably have a couple things going on here.
Did you set the Static in the hub network settings, or are you talking about an Address Reservation on your router?
Do you have any devices that have Jumbo Frames configured? That is known to kill the interface.
That has the possibility to corrupt the database. You should try a Soft Reset and Restore. Be sure to download your backup to your desktop first. That will clean the corruption without losing any rules or devices you have paired. Soft Reset | Hubitat Documentation
You really should answer the questions in the post below to help the community and support to assist you:
