I have strange problem with BMP280 on NodeMCU V3 with v2.0.0-dev12 (Normal and Testing). When I connect just this sensor my ESP can not boot. I have to disconnect sensor VCC, GND, reboot and then it is fine. After it is rebooted I can add (sensor's) power/GND, then I am able to read all sensor data. My ESP also detect I2C properly.
What's funny when I do soft reboot it is ok, but when disconnect USB power it doesn't work

I have tested also on Wemos D1 mini - same problem. Other sensors do not cause such problem.