Cannot retry inputting password

1. Create a file owned by root: sudo touch foo.txt
2. Open an another terminal (to end the sudo's session)
3. Open vim
4. :Suda foo.txt
5. Edit something.
6. :w
7. Input an incorrect password.
8. Error occurs without retry.

Password: ***Error detected while processing BufWriteCmd Autocommands for "suda://*"..function suda#BufWriteCmd[14]..BufWriteCmd Autocommands for "suda://*"..function suda#BufWriteCmd[3]..suda#write:
line   33:
E605: Exception not caught: Sorry, try again.^@Sorry, try again.^@^@sudo: no password was provided^@sudo: 2 incorrect password attempts^@

At this time, suda.vim inputs incorrect password severary. (See the error message.)