SpringBoot ValidationHandler no longer works with certain map keys

Just upgraded Spring Boot from 2.1.4.RELEASE to 2.2.5.RELEASE and my application.yml doesn't validate any longer.

For example, in this yaml, the itemOne works in previous version but fails validation now.

test:
  items:
    itemOne:
      COLOR: RED
    ITEM2:
      COLOR: BLUE

It seems any nested map key with uppercase letters will fail. Tried to debug and found getName() in ValidationBindHandler mangles the key into

test.items[item-one].color
test.items[-i-t-e-m2].color

This is apparently incorrect.

The code to reproduce the error is at https://github.com/zzcoder/spring-validation-bug

Comment From: OrPolyzos

Apparently this is caused by the fix for the #19580

Comment From: mbhave

This appears to be caused by #17424. Instead of getting the value of the field using the getter it uses the boundResults to look up the value. The field name doesn't match any names in the boundResults lists and the value is null, failing the rejectIfEmptyOrWhitespace validation. In the same above, the fieldName is test.items[item-one].color whereas boundResults contains the key test.items.itemone.color.