YR, I don't think your h is going through mlc a second time. I think his adventure in MLC land was interrupted and he's just picked up where he left off. I sense that he was so afraid that you were going to move on w/o him that he rushed to return home. Something "jolted" him back to reality back when he was touring the MLC land and now he's finishing up his crisis.
I think if you just be yourself and live your life as you have been, he'll not "run" again. From what you've posted, he feels safe in his home and w/you. That's what is important...feeling "safe".
I hope you are doing okay and spoiling the little one. BTW, how are your parents doing?
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
