Pro Tools 10.3.6 midi problem

Hi i am new to the forum. i am using PT 10.3.6 on a Mac Mini with a Focusrite Liquid Sapphire interface.



my midi output assign on each channel is not being saved and when i reopen the session i have to reassign all the midi out channels as they are shaded gray and not active.

i have recently upgraded to pt 10.3.6 and this problem was never apparent before.

any ideas? thank you.