Flurry analytics is showing many sessions of 0 seconds

Hi all, I have used the Draco extension in my app. Inside the flurry dashboard, many sessions are showing session length as 0 seconds (as shown in the screenshot below) and that is bringing the average time of users down on the app. The time should not be 0 seconds, it should at least be a few milliseconds if the session is starting, right? Probably the extension is not able to identify an exit event on the app for some cases. How do I solve this issue?