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.
Not a complete solution but a temp work around depending on device type. Press Ctrl + v instead of using the right click on mouse for paste. Screenshots below shows test result for both methods.
Read where @Peter says… “I don’t think I would have reached the conclusion myself, I should put minus numbers, through a copy-paste action with a Notepad as intermediary.”…
Now the question, this time round is, will Ctrl+V win against NotePad or not? lol !!!
Just copy and paste normally, then go and backspace to delete a character, retype a character and it will be fine. The TinyMCE rich text editor doesn’t capture a copy and past without some sort of “edit” to the pasted text.