T4X Daylightsavings doesnt work on automatic

[rphenix]

In New Zealand we recently transitioned to daylight savings. I have both T46G and T42G set to the following:
Time Zone: +12 New Zealand (Wellington, Auckland)
Daylight Savings Time: Automatic
DHCP time: Disabled

Firmware versions: T46G - 28.71.0.155, T42G -29.71.0.60
Neither phone models transitioned to daylight savings time. I have now manually set the daylight savings
Daylight Savings Time: Enabled
the DST start information was already correct, DST STOP Month needed adjusting from October to April but otherwise was fine and now the time is correct on the phones.