I noticed that the Submenu Arrow ">" was not working correct on my new phone. Maybe because a higher resolution?

I think it is because the link is just working when you click exactly on the ">" Symbol. So I made it 24px instead of 14px. Now it's working better but it's not looking so good.

Is there a way to make the Symol ">" smaller and getting the box still working. I tried it with margin but it was the same result.