Regression? shell-pop do nothing after the specific operation sequence

[sunlin7]

Hi, the shell-pop had do nothing after follow sequence:

$ emacs -nw -q -l ~/.emacs.d/elpa/32.0/develop/shell-pop-20260610.2231/shell-pop-autoloads.el
M-x shell-pop ;; pop up a shell frame and focus on it
M-x delete-other-windows ;; max the shell frame
M-x switch-to-buffer ;; switch to a non-shell buffer
M-x shell-pop ;; Nothing happened

It may be an regression issue that did not observed on old version (did not observe the issue before May. Maybe similar to the #96 )