I’ve noticed that if you are in the Cards tab the app becomes unresponsive if you do a swipe up or down. Meaning you can no longer swipe side to side to switch between cards. To fix this you have to switch to a different tab and then back to Cards tab. You need to use the back button on your phone to get out of the Card tab. This is not a big issue. But still thought I would share.
By the way, the phone I’m using is Galaxy S8. Running Android 8.0.