I had similar issue.

My txt file was opening correctly in notepad but in notepad++ It was coming up same as your example.

The solution for UTF-16 BE and UTF-16 LE formats adding special characters to the hex code of txt file before transferring.

For UTF-16BE you need to add 'FFFE' to your begin of the hex code. For UTF-16LE you need to add 'FEFF' to your begin of the hex code.

If you have hex code of TXT file this might be the solution you are looking for.

This fixed my problem.