I'm seeing session counts DECREASE over time when I check TestFlight for my app. It has been in TestFlight for an extended period (over a year and half) while we've been creating a new and improved alternative. CLARIFICATION: Because users are using this, after nearly 90 days we create a new build, so they can continue testing the app.
I've been checking counts about once a month, and this month most of my users are showing a DECREASE in the sessions column from last month. I'm always (now) using the ALL TESTERS choice.
My desire is to start asking the most active users if they are ready to test the NEW app, using the session count as an (imperfect) guide.
My question: Under what circumstance can session counts decrease over time?