The window of Dolphin is a certain width by default, for example, if I
set the width of the window to a certain length, Dolphin will remember
this when I close the window. However, if I maximize the window and
then close it, when I open Dolphin again, the window is maximized as
expected, however when I restore the window size by pressing ◇
(Restore) in the top right hand corner of the screen, the window is
unmaximized (restored) to the default width (not the width that I had
changed it to previously).

Can Dolphin restore the window to the width that I had set previously?
(or how do change the default width, so that I would not notice this?)

Reproducible: Always