BigQuery: issue with filtering data on timestamp

Trying to use Grafana to dashboard up some metrics stored in Google Big Query, and run into a blocker of an issue. The data source itself works fine with manually entered queries, but the Query Builder (in Explore or Dashboarding) doesn’t seem to recognise timestamp type fields.

As can be seen from the screenshot …
where adding a non-timestamp field updates the WHERE clause, but timestamp fields don’t. Which, given I’ve got a timestamp partitioned table in BigQuery causes me major hassle.

Has anyone else seen this and, if so, is there a fix?

(Using Grafana version 10.0.1 (MacOS/Homebrew))