[SOLVED] Can anyone verify that HTU21D module is not buggy?

Synchronous methods gives me the same results...

>htu.readHumidity()
=-6
>htu.readTemperature()
=23.78549316406

I am using a custom board based on NRF52. The firmware image is espruino_1v94_nrf52832_20171127.hex

I cannot easily check on one of my Picos because the sensor is really tiny and difficult to unsolder.
Agreeing to the code, the conversion function is looking like this:

-6 + 125 * this.readMeasuredData() / 65536;

Well if this.readMeasuredData() equals 0 the result will be -6, which is what I receive in my case...