We have the same issue with all of our Rich Text Fields - also primarily using Chrome, but I just checked and it is the same in Safari.
If we just copy, paste and click Update - nothing saves. So we have to copy, paste, click space and then click Update. Seems like a silly complaint, but it does get frustrating when you are trying to quickly update fields with notes from email, etc. Hopefully it can be corrected soon!
If you are doing a direct copy/paste into a rich text field (e.g., copying text from another web page or word document) it won’t recognize it. I always click on the source code button in the rich text field menu and paste the text in there then go clean up the formatting.
I have not encountered the error that @sahiraz has been encountering before.