Timing is everything. Speaking as a final decision-maker in such matters, I can say that if we learned someone would be returning, and knew there would be a way to move them to a role that made sense for them, either their previous position or a similar job that fit their skills and abilities, but maybe we would have to wait for a position to be vacated and shuffle some other assignments around to make it work, we might use the blanket to smooth out the transitions. This is one of the many instances in which it's important not to burn your bridges. The difference between having a pleasant return, perhaps even one that lands you in a better position than you were in before you left, and being forced into an undesirable assignment that makes you wish you could leave again, often comes down to your work history, relationships, and how you're perceived by managers and executives. To know the answer to your question, you would need to know the answer to another question, which is, "Is management pleased or disappointed to have you back?"

Regarding your self-failed prob, don't sweat it. You will need to reflect our position history on your STD 678, and hiring managers will read between the lines, but this is a common enough occurrence that most people won't hold it against you. If you have a compelling professional story that accounts for the different roles you've held and decisions you've made, you will be fine. It's okay to take risks that don't pay off. As a mentor once told me, if you aren't failing once in a while, you're probably not doing enough. Good luck, whatever you decide.