I have this issue as well with all my stored notes. Going back to each note and editing it to simplify formatting or nest it in a code block would be quite time consuming and therefore not an option. When I copy a section of text (code) from a note and paste it into notepad++, it looks correct. It is only when I go to deploy that code that systems choke on it because it has a high ASCII. I can see this by opening the file in a hex editor and seeing what looks like a single space in notepad++ as two hex values C2 A0. The first is the Latin capital letter A with circumflex and the second is a non-breaking space (https://www.ascii-code.com/). In notepad++ if I show all characters, it shows spaces as a dot and this high ASCII remains looking like a space (as it does for high ASCII). My workaround for now is to do a replace in notepad ++, replacing the "fake" space with a real space. Different editors seem to handle the data copied from Evernote differently. Microsoft Word shows the value as a small circle in the uppercase region of the line. Some editors convert the value to a space (Hex 32) or remove them entirely.
Pasting the text into a code block does seem to remove these high-ascii if they are at the start of the text, but do not remove it from within the text.
Simplify formatting also does not resolve the issue.