frame/windows layout change when opening minibuffer

[maxecharel]

I am currently testing nano-emacs (cloning repo + emacs -q -l nano.el approach), thx for this gem! Anyway, calling the mini-buffer modifies the dimensions of the Emacs window/frame.

With my standard init file, no problem:

With emacs -q -l nano.el, calling the mini-buffer 'untiles' the Emacs frame/window:

Any idea on how to solve this? While the problem may come from my DE (KDE)'s window manager, my standard config is surprisingly not impacted.