Nested IN' being used in Pivot Tables?

I know the beta 'nested IN' functionality has only been tested in a (regular) Table macro.

I've also gotten it to work fine in a Value Query, as would be expected.

However, I'm getting an error when trying to implement in a Pivot Table: Error in pivot-table macro: undefined method `accept' for nil:NilClass

Any suggestions? Anyone able to get 'nested IN' functionality to work in a Pivot Table?

Here's my Table Query (which works):

  table    query: SELECT number, name, 'Task Status', Team, 'Iteration - Scheduled', 'Estimate', 'Story Tree - Story' WHERE Type = Task AND 'Story Tree - Project' = NUMBER 2732 AND 'Story Tree - Story' IN (SELECT number WHERE type = Story AND Release = 74) 

Here's my Value Query (which works):

  value    query: SELECT SUM(Estimate) WHERE type = 'Task' AND 'Estimate' != 0 AND 'Estimate' != NULL AND 'Task Status' = 'Not Started' AND 'Story Tree - Story' IN (SELECT number WHERE type = Story AND Release = 74)

Here's my Pivot Table, which throws the error:

  pivot-table    columns: 'Task Status'    rows: 'Team'    conditions: type = 'Task' AND 'Estimate' != 0 AND 'Estimate' != NULL AND 'Story Tree - Story' IN (SELECT number WHERE type = Story AND Release = 74)     aggregation: SUM(Estimate)    totals: true    empty-columns: false    empty-rows: false

Notes: Task Cards are below Story Cards. 'Release' is a Story Card property. 'Story Tree - Story' denotes a Story Card on the Story Tree (yes, I know that's ugly). All other card properties mentioned are Task Card properties.

I could really use this Pivot Table. If using 'nested IN' doesn't work, it appears I'm stuck using ~18 Value Queries, which I'm not looking forward to.