Season Missions - Trail 1/5

My 1st question here, I swear I searched first :smile:

So, the Highlights and Season 7 missions have the Trail 1/5 at the end... After completing 1 trail, the "cool down" timer starts. It's supposed to go to 2/5 but when I come back it's back back at 1/5.

Is there a glitch or is there something I don't understand about the Trails? I am playing the older seasons and sometimes while one is on cool down, I start another trail. Is this maybe the problem?