

Thats not completly right at least under german law (and most likely also under us law).
A license is basically a contract between you and the copyright owner. If the copyright owner changes the distribution of a piece of software to a new license you have a diffrent contract with them. So you have to hold up this new license. If you already had a license (in this case gpl) you can use this old contract, but you can not download a new copy delete what was added since the copyright change and use that under gpl. You would have to proof that you had the gpl license before or in this case that it got relicensed to you.
So when they do code reviews and a complete file sliped through what does that say about the quality of their reviews? Either they didnt want this file in there, then their qa is shit or theydid want that file in their, then they are vibe coding to an extend