Hi,

Between the 4.17.2 and the 4.17.3 versions, I noticed that the _.omit function is deteriorating the object when this is in deep level.

For example :

const object1 = { a: { b: 'c' } };
const object2 = _.omit(object1, 'a.b');

console.log(object1);  // { a: {} }