CSB to VCC on the BME280 Module.
This is from the BME280 datasheet for the little sensor. Recently my BMP280 has been doing the same as your BME. It has been running well since I connected the CSB to VCC. Follow what @Arh suggested first. SDO to GND is only to get x76 address if you needed it to be that. Assuming a 6 pin bme module.