LCD and BMP180

[nightshark]

I'm trying to connect both an LCD with the I2C backpack and a BMP180 on the SDA/SCL lines. However, it's not working. The module boots up and displays 'ESP Easy' on the screen, but after about two minutes it disappears. The BMP seems to do one reading and then freezes. The LCD was working fine before I added the sensor. Does anyone have some guidance to get this working? I figured it would be rather simple.

I am using R106 with a 1.0 development board.

[Drum]

Do you have Pull up resisters on the I2C lines? Have you checked they use different addresses?
Is this a 5V BMP with a 3.3V regulator and level shifter?