The "Not In" query operator doesn't work as expected if a board is set up to use project milestones (subprojects).
Example (filtering out tasks assigned to specific teams):
- https://phabricator.wikimedia.org/maniphest/query/Sy6OU1BCQoDE/#R returns task T358268 as expected
- https://phabricator.wikimedia.org/maniphest/query/QrhqcVd72bLV/#R returns task T358268 (tagged Data-Platform-SRE (2024.03.25 - 2024.04.14)) where I would expect the "Not In: Data-Platform-SRE" operator to filter it out.
@valerio.bozzolan pointed out that this was captured in a (still open) Phabricator bug https://secure.phabricator.com/T12438.