Previously, push notifications correctly displayed app information (picture #1). I tried to change a little notification design and now it has begun to hide the information inside, although it cannot be expanded (picture #2). Information will be visible only if I swipe the notification from left to right to select an action (picture #3). I can’t understand how this happened and what affects it, I only changed the design and returned it to how it was, but the problem did not disappear. At the same time, the notification is displayed correctly on the lock screen (picture #1).
I tried to return everything to its original state at the moment when everything worked correctly, I also tried to change the target version of Android between 33 and 34.