I also have a few pages with %20 (space) in the url as well
Lesson: Do not let your cat make your URLs. But spaces are easy: you just have to escape them, as you'd escape literal periods or parentheses. And even if escaped, a space can't be the very last thing on the line. 98,000 guesses how I know this.
Did you mean %E2%80%8B literally? I hope you're simply deleting it. Depending on context it's either a zero-width space or a misplaced BOM.