Having an issue with my libre instance where it only will show the IP of the device rather than using Sysname even though I have set in the WEB UI settings to use sysname and included in the config.php the force_ip and force_hostname to sysname. Here is a snippit of my config.php, web UI, web UI settings, and ./validate.php
I noticed that if I manually edited a devices display name and then deleted it, it fixed it for that specific device. I ended up doing a SQL command to set the display names to sysnames
UPDATE devices SET display = sysname;
and used transactions to make sure it did not do anything wonky.