RAP Fiori Elements deletes equals sign (=) from input field

[AlwinvandePutTM]

Hello,
• On a S/4HANA 2022 system, I created a simple test, to reproduce the error by creating a database table with

define table zz_so {
  key client : abap.clnt not null;
  key sales_order_no : zz_so_sales_order_no not null;
  key description : zz_so_description not null;

The Data Element ZZ_SO_SALES_ORDER_NO has a Domain with the same name with Data Type CHAR and length 2.

• I generated a UI RAP service based on this DB table.
• Press button Preview

• Press button Create and fill =B

• Press tab

• Now you see that "=B" is changed to "B".

The reason for the equal sign is that the actual field wherefor it is needed, can contain values like =B, =b, 4k, ?a.

How to turn off this behavior?

[rammel_sapdev]

Why do you need to put an equal sign?

[AlwinvandePutTM]

The reason for the equal sign is that the actual field wherefor it is needed, can contain values like =B, =b, 4k, ?a.