Konsole in full screen becomes smaller after altering tabs

The screenshot is about altering tabs for 30 times without doing anything on window size explicitly. Obviously, Konsole has a smaller scale without changing the maximized state, which can be indicated by icons in the upright position. It’s so weird! I just began to suffer from it some days ago.

System info: Arch Linux, Plasma 5.27.9, Konsole 23.08.3