How is the "Timeout" countdown supposed to work?

I’ve been a huge fan of the app since day 1, it has been really helpful for me.

I typically use Sessions with a difficulty of timeout. When I first started using the app, it seemed like the timeout countdown clock reset every time I left the app. This was honestly great, because I’m less inclined to keep Opal open for 2 minutes, just to scroll instagram for a bit.

In the past couple days I have noticed that I will open Opal and i’ll have a break waiting for me and countdowns rarely reset when i leave the opal app. It’s really inconsistent seeming. I’ve been using my blocked app group way more frequently due to this change.

So how is this supposed to work? More specifically, what user actions are supposed to trigger a countdown reset?