TL;DR: Can't use E while entering Unicode on NumPad — conflicting with Options menu
OK, so I finally got entering Hex Unicode chars on my laptop using the NumPad working using this answer from this link. Now, you all you have to do is hold down Alt and press + + Hex Code in succesion.
But when I was trying to enter the Irony Mark (؟ U+2E2E), as soon as I hit the E, Options opened up like in old-style menus where pressing Alt + letter brought up the relevant menu. This annoying behaviour doesn't let me enter any Unicode code-point that has an E.
This works fine outside Chrome.
How can I stop this?