File manager cannot remove invalid soft link

I thought this maybe a bug.the problem is quite simple. If I create a file or directory, then create a soft link and link it to that file we just mentioned.next step, remove the file to make the soft link invalid.
Then, If i delete the soft link by api. i will get an 404 error, tell me File or directory does not exist.
so seems like this invalid soft link cant remove forever.