"last_state_change" shows "1970-01-01 01:00:00" for unreachable host

[tectumopticum]

Describe the bug

When a host-object is displayed as unreachable since it was created and checked the first time, the "last_state_change" shows the date "1970-01-01 01:00:00" (seems to be Unix-epoch timestamp 3600).

To Reproduce

1. create a new host-object with an unreachable IP
2. deploy
3. check "last_state_change" in icingaweb2 "Problems -> Host Problems" by clicking on the event of the new host-object

Expected behavior

The 0- or 3600-default-value (epoch depends on the timezone) of last_state_change-field should be filled with the timestamp of the moment when the "hostalive"-check has marked the object as unreachable/down.

Screenshots

Your Environment

• Icinga Web 2 version and modules (System - About): 2.12.1
• Web browser used: Firefox 128.4.0esr (64-Bit)
• Icinga 2 version used (icinga2 --version): r2.14.2-1
• PHP version used (php --version): 8.1.29
• Server operating system and version: SLES 15 SP6