If the user has a code FString that used "\n", that's interpreted as a line break and is removed. This can cause confusion for users attempting to get the length of the value since it will not match what they expect.
The specific case a user encountered was with a Google RSA key that had this in the string.
With Attached Project:
Test String reads "Test Test" on two lines.
Test String reads "Test\nTest".
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-92725 in the post.