Some rebels refuse to join (Grouping devices from ipv4 is almost working)


I’ve setup around 20 groups of devices based on ipv4, that can be seen as such :
ipv4_addresses.ipv4_address LIKE '10.32.5.%' for example and all groups are getting filled up nicely.
Amongst the 170 devices discovered are remaining around 20 devices that still tend to stay ungrouped, yet their ipv4 are part of some groups.
I don’t know where to look to debug this grouping issue?

Is my group filter wrong?

For information, my LibreNMS setup is docker based, and here are the details :

librenms:/opt/librenms$ ./validate.php 
Component | Version
--------- | -------
LibreNMS  | 22.12.0 (2022-12-30T10:17:16+01:00)
DB Schema | 2022_09_03_091314_update_ports_adsl_table_with_defaults (248)
PHP       | 8.1.13
Python    | 3.10.9
Database  | MariaDB 10.5.19-MariaDB-1:10.5.19+maria~ubu2004
RRDTool   | 1.7.2
SNMP      | 5.9.3

[OK]    Installed from package; no Composer required
[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]    Active pollers found
[OK]    Dispatcher Service is enabled
[OK]    Locks are functional
[OK]    No python wrapper pollers found
[OK]    Redis is functional
[WARN]  IPv6 is disabled on your server, you will not be able to add IPv6 devices.
[OK]    rrd_dir is writable
[OK]    rrdtool version ok
[WARN]  Non-git install, updates are manual or from package