Issue with quotation marks and apostrophes

As the title said, I'm having an issue pasting texts that contain quotation marks.

The content is copied fully but the quotation marks have this space with them.

For example, copying "vocabulary" from a pdf file;

And pasting it on SiYuan;

It will paste it like this:“vocabulary”instead of this "vocabulary". Again with both side by side “vocabulary”"vocabulary".

For apostrophe: mathematicians’mathematicians'

I have just noticed it now, but it also has this extra space here on the LiuYun editor.

I'm not sure if the cause is on my end, thanks for anyone that'll help!