…pes looks to have changed. Previously the types of a useFacetMap for example would look like so: After 5.1.3 the types look like so: The selector arguments are infered as the union of the types of all passed in Facets, rather than each arguments type corresponding to their Facet's inner type. This change fixes that issue by explicitly making the array type we were previously extending into a tuple type. This allows TS to correctly infer the arguments' types.