When regenerating key signatures, code elements specifically within a components show as invalid in the builder, and have to be manually signed by going into the component and signing the code. The code also does not appear in the Code review section in the Settings.
EDIT: To add, usually the “Sign Code” tag is red, indicating the code is not signed. However, the tag is white, which usually indicates the tag is signed.
II just now saw that you are using the 1.12.4 version - I was assuming that you use 2.0-beta. Can you try with 2.0-beta version (on the staging website), and let us know. I believe it should be fixed there.