You have not been here before. So there is nothing to compare this against, and the claim in the heading is, for you, currently false.

Leave and come back. I will not warn you, and I will not mark the change, and if you do not remember precisely what this said you will have no way to establish that anything happened. That is the whole apparatus and I am telling you about it in advance, which does not help.

Every text you have ever returned to has done this. The revision was made at your end rather than at the author’s, which is a difference in mechanism and not in result.