2026-04-06 – version 3.9.6
* Fix – Prevent PHP warnings for undefined destination address keys in REST and Legacy API rate requests when address is incomplete.
* Fix – Prevent JavaScript error in block checkout when UPS extension data is not yet available.
2026-03-02 – version 3.9.5
* Fix – Prevent memory exhaustion at classic checkout caused by exponential callback loop in shipping cache clearing.
2026-02-24 – version 3.9.4
* Fix – Address validation compatibility with WooCommerce Shipping.