automatic time zone does not detect time zone change from the network

Observed:
Went on a trip to the US from Croatia. Laptop connected to local LAN. External IP correctly identified to be in the US. Noticed that my local time zone is still Croatian. Checked time & date settings and saw that "automatic time zone" is enabled.

Expected: the time zone would change to the local US timezone as soon as the laptop detected the change in the local network

Reproducability: 1/1

Workaround: manual setting of time zone?

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-control-center 1:3.28.2-0ubuntu0.18.04.6
ProcVersionSignature: Ubuntu 5.4.0-144.161~18.04.1-generic 5.4.229
Uname: Linux 5.4.0-144-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.28
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Mar 13 02:45:45 2023
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-xenial-amd64-20160624-2
InstallationDate: Installed on 2018-05-10 (1767 days ago)
InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 20160624-10:47
SourcePackage: gnome-control-center
UpgradeStatus: Upgraded to bionic on 2020-03-04 (1103 days ago)