Zend certified PHP/Magento developer

Magento Region is not shown after address save in the checkout

I faced with the sitation, when I can’t see the region I saved in Checkout Addresses.
I can’t see region value being saved in the estimate-shipping-methods request:

Request after form save
After form save

Basically, the problem exists on one store, another one works ok.
Magento version 2.4.2