Why does the "cp" command not work with pasted directory path from "pwd | pbcopy" command?

I ran pwd | pbcopy command in Terminal on my MacBook Pro to copy the working directory to the clipboard. The working directory looks like this:

/Users/JohnSmith/PycharmProjects/100 Days of Code - The Complete Python Pro Bootcamp2/Day 2/Type Error, Checking and Conversion

But when I change to another completely different directory, type cp followed by CMD+V to paste the first directory path I get this error message:

cp: Conversion is not a directory

However, when I edit the clipboard content to append a forward slash character "/", I do not get the error message above. But when I then append the name of the file that I want to copy like this;

/Users/StephenLearmonth/PycharmProjects/100 Days of Code - The Complete Python Pro Bootcamp2/Day 2/Type Error, Checking and Conversion/task.py task-2.py

I get this error message:

cp: task-2.py is not a directory

It only copies the file task.py when I put double quotes around the directories in the copied directory path. Is this a bug with Unix or the pwd | pbcopy command? Anyone else had this problem?