Make the "Input Method Panel" extension fit the lable?

[HubKing]

I installed FCITX5 and Input Method Panel extension to use it on Wayland Gnome, and for some reason, on one computer, the IME name pop-up fits the label width, and on another computer, the pop-up stays as the size of the longest IME name.

I tried various things, but I could not figure out how to make the pop-up fit the label width. Does anyone know why this is happening and how to make it fit the label width?

Picture1: On a computer, the pop-up does not fit the label

Picture2: On another computer, the pop-up fits the label