All GPU, ISP and ANE temps repeatedly show 30℃ sometimes

[Chiroyce1]

Environment: macOS 13.4.1, GNU Make 3.81 (built for i386-apple-darwin11.3.0)

ANE MTR Temp Sensor1 (°C), GPU MTR Temp Sensor1 (°C), GPU MTR Temp Sensor4 (°C), ISP MTR Temp Sensor5 (°C)
30.000000, 30.000000, 30.000000, 30.000000

Sometimes it jumps to the actual readings (between 40-50 idle) - then goes back to 30.000000 — is it just that no newer reading is available so it defaults to 30.xxx or is it the actual reading from the sensor?