Lot status is not changing after sample disposition. Please help

Created the Item with Lot control, Lot Status enabled. (default lot status set as "QC-T")

Defined Quality Specification and Validity rules for WIP & Inventory

Created and completed the Production batch and stored the finished product with Lot number and Lot status as "QC-T" in specific Locator.

Then, created the Item sample with Source as "WIP" and entered the Batch number and Lot number, saved and generated the sample number.

Entered the results, results are "In-Spec" and accepted.

Did Disposition as Accept. Expected result is Lot status should change from "QC-T" to "Good" as defined in Specification validity rule. But Lot status not changed and remains "QC-T".