The code (for StickC)

import os, sys, io
import M5
from M5 import *
from hardware import *
from unit import ENVUnit

label0 = None
i2c0 = None
env4_0 = None


def setup():
  global label0, i2c0, env4_0

  M5.begin()
  label0 = Widgets.Label("label0", 4, 26, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu18)

  i2c0 = I2C(0, scl=Pin(33), sda=Pin(32), freq=100000)
  print(i2c0.scan())
  env4_0 = ENVUnit(i2c=i2c0, type=4)
  label0.setText(str(env4_0.read_temperature()))


def loop():
  global label0, i2c0, env4_0
  M5.update()


if __name__ == '__main__':
  try:
    setup()
    while True:
      loop()
  except (Exception, KeyboardInterrupt) as e:
    try:
      from utility import print_error_msg
      print_error_msg(e)
    except ImportError:
      print("please update to latest firmware")

The output :
[68, 118]
Traceback (most recent call last):
File "<stdin>", line 22, in <module>
File "<stdin>", line 15, in setup
File "unit/env.py", line 1, in init
File "driver/bmp280.py", line 113, in init
ValueError: device not found

However, the 2 sensors are well detected during the I2C scan ( 68 is the SHT40, 118 is the BMP280).

With Firmware V2.0.7, no issue for both devices.