Comment 2 for bug 1980001

The "N track files were removed" dialog is not supposed to close itself.
Are you saying the dialog pops up, and while you do nothing (no button on keyboard or controller pressed, no mouse click), it is closed magically?

Note that controller with a Browse or Trax push/rotary encoder have [Library],GoToItem mapped. Per context this will trigger different actions, see https://manual.mixxx.org/2.4/en/chapters/appendix/mixxx_controls.html#control-[Library]-GoToItem, e.g. in dialogs it can press buttons.