Almost all of the keys. shortcuts in Cheatsheet are clashing with default Safari shortcuts (Mac):
Hi @Valery_Kondakoff, we are aware of keybinding inconsistencies / clashes between browsers and OS. It is difficult to provide a consistent experience for keybindings until we release our desktop apps later this month. We have done our best to mitigate this, for example you will notice that some keybindings such as [cmd] + [I] will only come into effect once you are editing a card (for italics).
We will have another review of our the keybindings - although some of the ones you have listed, (Cmd + P) for example, makes use of the native Safari print shortcut.