Cannot read from HID device after migrating from fileapi.h ReadFile in windows to hidapi hid_read in Ubuntu

I have a library for communicating with a HID device. The library works fine under windows using fileapi.h and read/write with ReadFile and WriteFile. I now want to make this library platform independent so I decided to migrate to hidapi. On Ubuntu writing to the device with hid_write works fine, but I seem to struggle with hid_read_timeout. The read works, but the values I receive are not correct, i.e not the same as in Windows using fileapi.h.

I want to read some bytes into my data buffer

std::shared_ptr<unsigned char[]> data_buffer(new unsigned char[65]);

using

this->device_handle = hid_open(vid, pid, NULL);
hid_read_timeout(this->device_handle, data_buffer.get(), 65, 5000);

the read succeeds and the data consists of an array of ints so i later pairwise combine the bytes into ints

unsigned char high_byte = data_buffer[i];
unsigned char low_byte = data_buffer[i + 1];
uint16_t t = ((uint16_t)high_byte << 8) | low_byte;

This works fine in windows, and i cant figure out what i'm doing wrong. My knowledge about USB and HID protocols are very limited.

For reference in Windows i use

this->device_handle = CreateFile(device_path, GENERIC_READ,  FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);

To create a read file handle and the read looks something like

if (!ReadFile(this->device_handle, (LPVOID)data_buffer.get(), 65, &num_bytes_read, &overlapped)){
  switch (WaitForSingleObject(read_done_handle, 3000)){
    case WAIT_OBJECT_0:
      GetOverlappedResult(read_handle, &overlapped, &num_bytes_read, false);
      break;
    ...
  }
}

Any help/tips are appreciated!

I tried switching backen from libusb to hidraw but that did not make a difference. I also tried many other different things but my knowledge is limited when it comes to HID and USB communication.

The problem was that on Ubuntu using hidapi the array of bytes received from the firmware was shifted as when compared to Windows. On Windows I got an extra byte in the beginning of the received array!