It is impossible to get into any task that is under team tasks if your using iOS and the LF App starting today.
Once the task is assigned to you, each time you try to open by touching the task, it just minimizes the app to the background and returns to the desktop.
If you return to the app again, and touch the task, again it minimizes to the background.
I don't know any way to get around this.
The version of the app is 2020.1.17.234541
The iOS version on my test device is 13.3 but it appears it happens on any iOS device/version so far.