magento2: Customer Prefix is not saved in guest orders

Preconditions (*)

1. Magento 2.3.4

Steps to reproduce (*)

1. Set customer/address/prefix_show to required
2. Go to the frontend and purchase an order as guest
3. During the checkout process make sure, that the prefix is required and this way filled

Expected result (*)

1. I would expect that the prefix is saved in the database and is shown in the order view in the backend.

Actual result (*)

1.The prefix is not saved and not shown in the backend order view.