Zend certified PHP/Magento developer

Magento 2.4.6-p3 Checkout not longer detects registered account

I have a problem after update to M2.4.6-p3.
On Checkout with registered but not logged user after email inserting, the registered account will now not automatically detected.

For example, the screencasts for M2.4.6 and M2.4.6-p3:

Magento 2.4.6 –
https://www.awesomescreenshot.com/video/24352710?key=6e1dac0fe89ea29f5bc4588b6c38ad64

Magento 2.4.6-p3 –
https://www.awesomescreenshot.com/video/24352800?key=7a4da78a4cf1c62acf2c519f996f1b4e

Any idea?