Different behavior between type [Boolean, String] and type String in custom my-select components

[rukonmin]

Version

2.6.14

Reproduction link

codesandbox.io

Steps to reproduce

In MyBooleanStringSelect component

1. prop value = ''
2. Display result is True

What is expected?

Empty string value

What is actually happening?

Value is True

---

MyBooleanStringSelect and MyStringBooleanSelect have different behavior for prop value equals to ''

[posva]

As explaining multiple other issues this is expected

[rukonmin]

#11058

As explaining multiple other issues this is expected

<MyComponent required/> where prop required can be empty string