Can't browse through clipboard items with custom key bindings

Thanks a lot for this mighty tool.
As mentioned in the title, I'd like to browse through clipboard items on clipman with Emacs key bindings (Ctrl+P for up and Ctrl+N for down)

I attempted for the following two ways to do it, but neither worked as expected.

1. Change key settings with xfce4-settings-editor
   https://forum.xfce.org/viewtopic.php?id=8189

2. Apply Emacs key bindings globally with autokey
   https://github.com/autokey/autokey

Everything work perfectly with arrow up and down keys.
However, when I press Ctrl+P and Ctrl+N, another app running in the back is focused for some reasons.

For instance, if I open clipman on Kali desktop and press Ctrl+P and Ctrl+N, desktop icons are focused, not clipboard items on clipman.

Is there any way to make it work?
Appreciate if someone gives me some advice.

Version
Kali linux v2021.3.0