Yes, I think a lot of folks on this forum have experienced it.
With my T, I finally just told her that i struggle to hold on to our connection between sessions. She asked if emailing or texting in between sessions would help, and I agreed to give it a try. It does help, but I went in to it with the understanding that T's replies would be very brief and of the "I'm still here, got your message, we'll talk in session" type. T rarely gives more detailed replies in email or text...if she feels something needs to be addressed before the next session, she'll ask if she can call me.
Would some kind of in between session with your T be an option for you? Even if he just replies with "still here."