1, back to the past: In some cases, changing the original signature is a nostalgia for the past, or a deep nostalgia for what has been lost. This shows that they have been thinking and reviewing the past relationship during this time, hoping to return to a certain state in the past.
2. Self-confirmation: Changing the original personality signature is also a kind of self-confirmation. Three months after breaking up, they have a new understanding of their feelings and values, and think that their previous personality signatures can better represent their current thoughts and feelings.