Agree with Chris^^^, but its worth addressing some confusion in your post.
"The clip I'm working on has 15 track sessions .7 of the edited tracks are missing a few minutes after editing." By "clip" do you actually mean "session". Did you mean you are working on a session with 15 tracks? Is the .7 actually supposed to be a period for the previous sentence and then the 7 is the start of the next question? What went missing and when? Was it a few minutes later on the clock, or a few minutes later on the time line? Maybe its me, but the post is confusing(honestly, no insult is intended
)