When I make something italics*italics* using an asterisk on each side of the word, like here in this post, in editor mode, I see the asterisks, but the text is italicised. But in preview mode, I see the asteriks, but the text is normal. I tried different themes too, but it’s the same across the board. Is there a different way to indicate italics in Obsidian?
I agree with mnvwvnm – this is most likely a theme or some custom CSS that’s changing how italics are rendered. I suggest going back to the default theme and turning off all snippets (if you ave any) and see if italics behave the way you expect.