I am starting my second year of PhD (in engineering) in the US after earning Master's degree outside the US. My advisor notified me that he'll be going abroad for leave of absence for at least 1 year, and probably extend it to 2 years.
He told me the funding is available for 3 years but unsure of how much he can advise me closely. Every meeting will be remote for the next two years, and not as frequent as before.
Also, I am now assigned to a different professor as a co-advisor.
He said he is planning to come back after 2 years, but that is also not guaranteed because he said he cannot predict the future.
In this case, would it be wise to discuss with him on transferring to another university?
I would have to sacrifice two years if re-apply for PhD, but if that helps for my PhD I would surely do it.
Also, I would like my advisor to help me transfer since I believe we do not have any conflicts or bad relationship.
What worries me is that I might make him upset for trying to move since he already assured me of the funding. But I am not here just for the funding but for his advice on my graduate career. I am not sure how much I can have that.
Any advice in this situation? Thank you in advance.