120th payment

My final payment is due June 22nd. I just got notice that my account will start transitioning on June 11th and will finish two weeks after that. Would it be better to apply the payment on June 1st and then wait for it to post and then apply for forbearance or let the account transition and try to pay as normal?

Just wanting as few hiccups as possible so I can be done with these loans.

Frustrated all of these pauses and transitions are happening now :(