"end of buffer" in emacs 27.1

[HuStmpHrrr]

system: ubuntu 20.04
emacs 27.1

switch-window seems to only able to create two windows. when trying to create more windows, it shows End of buffer:

switch-window--create-label-buffer: End of buffer [2 times]

It probably has something to do with creating the overlaying labels?

[HuStmpHrrr]

This error only occurs when 'asciiart is set:

(setq switch-window-shortcut-appearance 'asciiart)

[tumashu]

please try again