Animations not working

Bugs
4

As the spinner animation and the screen transition has good timing and a decent FPS I assume there are no issues with

  1. the tick of LVGL (lv_tick_inc())
  2. the performance

The missing “Loading…” label is really strange.

Could you try out these:

  1. Enable LVGL’s logging
  2. Print the coordinates of the “Loading…” label periodically.
    E.g. printf("%d\n", ui_label_loading->coords.y1)