Macbook) some keyboard shortcuts don't work after entering Korean text

There's some circumstances that I need to enter Korean text into the score,

But whenever I enter Korean text for its title or lyrics, some of keyboard shortcuts don't work.

To be specific, I need to press 'option key' to activate these shortcuts.

Ex) I should press 'opt' + 'N' for note input instead of only 'N'.

I've checked same thing happens on 'V'(invisible note) and 'P' (piano roll) so far.

It really distracts me and hope this error to be fixed soon....