Oxidized config tab missing on one device

Component | Version
--------- | -------
LibreNMS  | 22.6.0
DB Schema | 2021_02_09_122930_migrate_to_utf8mb4 (242)
PHP       | 7.4.28
Python    | 3.9.2
MySQL     | 10.5.15-MariaDB-0+deb11u1
RRDTool   | 1.7.2
SNMP      | 5.9

[OK]    Composer Version: 2.3.7
[OK]    Dependencies up-to-date.
[OK]    Database connection successful
[OK]    Database Schema is current
[OK]    SQL Server meets minimum requirements
[OK]    lower_case_table_names is enabled
[OK]    MySQL engine is optimal
[OK]    Database schema correct
[OK]    MySQl and PHP time match
[OK]    Connected to rrdcached
[INFO]  Detected Dispatcher Service
[OK]    rrdtool version ok
[OK]    Connected to rrdcached

I have oxidized running for some dozen devices, and I see their config in Librenms via the “Configuration” tab with no problem. I have versions and all.
There is one device that does not show the configuration tab. I read other threads and checked that:

  • adding /tab=showconfig/ to the device URL gives me the config
  • curl http://localhost:8888/node/fetch/$IP-ADDRESS$ gives me the config
  • the device is added via IP address, the same is in the router.db oxidized config (I do not feed the devices via Librenms but I update the config file manually)
  • no device_attribs are set for this device in the DB
  • rediscovering the device does nothing

The device is a NXOS Nexus switch.
Any Idea why this device does not show the tab or where to check for hints about the problem?