Unable to access Map entries with array keys by value in getFacetedUniqueValues function

TanStack Table version

8.12.0

Framework/Library version

NextJS v14.0.4

Describe the bug and the steps to reproduce it

I've encountered an issue when using the getFacetedUniqueValues function to retrieve the faceted unique values for a column in a table. The problem arises when the column value is an array and I attempt to access the corresponding facet using the array value as the key.

Your Minimal, Reproducible Example - (Sandbox Highly Recommended)

https://stackblitz.com/edit/tanstack-table-stfatx?file=src%2Fmain.tsx

Screenshots or Videos (Optional)

Status: Shows the number of entries for each option

Labels: Nothing due to it being an array

Do you intend to try to help solve this bug with your own PR?

None

Terms & Code of Conduct

• I agree to follow this project's Code of Conduct
• I understand that if my bug cannot be reliable reproduced in a debuggable environment, it will probably not be fixed and this issue may even be closed.

Start with the linked StackBlitz reproduction, especially src/main.tsx, and inspect how getFacetedUniqueValues is used when a column value is an array. Reproduce the lookup and compare the displayed statuses and labels. Done means array-valued facets can be accessed by value and their labels render correctly.