[EDIT: 0.6.1 is now out: BigQuery Loader 0.6.1 released .]
We have identified a bug in the latest version of BigQuery Loader, our family of apps that load Snowplow data into BigQuery. In version 0.6.0 it is possible for contexts to get dropped. While the event will be loaded into BigQuery, the context information will be stripped away.
This affects both the experimental StreamLoader and the established Loader apps.
Please do not upgrade to 0.6.0 at this time.
We are working on a fix and will keep you updated.