People's behaviors can be complex and influenced by various factors, making it difficult to make precise predictions about their actions.
That said, narcissists often exhibit patterns of behavior, including seeking new sources of attention and validation (often referred to as "supply") when their previous source no longer serves their needs or is no longer available. They may cycle through various sources of supply, seeking validation and admiration from different individuals.
In some cases, a narcissist may attempt to circle back to a previous source of supply if they feel it serves their interests or if they encounter difficulties with their current source. This behavior may be driven by a desire for control, validation, or a feeling of superiority over their previous targets.
It's important to note that every individual is unique, and there is no one-size-fits-all answer to how a narcissist will behave in a given situation. If you have encountered a narcissist or someone with narcissistic tendencies in your life and are dealing with difficult emotions or situations related to that, seeking support from friends, family, or a mental health professional can be helpful. They can provide guidance, understanding, and strategies to cope with the challenges that arise from such relationships.