I was reviewing postcards in the postcard menu by individually reviewing each postcard and swiping to turn to the next one, after around 10+ postcards my phone starts to lag and eventually crash, I think this is because on each postcard on top portion of the screen it shows the location on the world map of where the postcard is from and if you are consistently switching between postcards it can make the world map dart around and lag/crash.
I know it’s not up to me to make/find a solution but I suggest just disabling the world map when a postcard is selected and fully covering the screen, also I’m not suggesting to remove the world map as I think it’s an amazing feature but just to be disabled when postcards are selected to full view! (<- and to note: selecting a postcard to full view is already in the game, the map just needs to be disabled.)
Thank you Niantic developer team!