At least some date filters cause a type mismatch in which the filter is cast as as timestamps even when the original field is a datetime, causing all filters to display no data.
Hi @brendan
It looks like you’re seeing this issue, since I’m guessing you’re using BigQuery on 0.33.6:
https://github.com/metabase/metabase/issues/11222 - upvote by clicking 
on the first post
It’s scheduled for 0.34.0 (that’s not always a guarantee)
Yes, 0.33.6. Sorry for not mentioning. And thanks for tying it to that bug. That’s definitely the issue.