Could you contact support(at)lysesoft.com, they should be able to provide a new testing version to check if it works now.

Make sure to upgrade to AndFTP 6.7 and enable settings->advanced->expert->SSH Provider="Secure"

Could you try to upgrade to 2.9.5 and see if you sill have the issue?

Long press the share => Copy => Save (with your new name) and Delete the old one.

You've upgraded SSH support in AndFTP 6.7. Could you try it?

Just Edit => Copy and then Save with the new name you want.
You can delete the previous one later.

Please upgrade to AndFTP 6.7

Are you under Android 15+? I've just tested FTP(E)S under Android 15 with AndFTP 6.7 and it looks good.

Try to upgrade to AndFTP 6.7 and let us know if it works.

w2.a@6c0bb78 (<-- idk what account that is)
It's an ofuscated string. Let us know if you still have the same problem in 6.7

Try to upgrade to AndFTP 6.7 using Secure (includes ED25519) provider and let us know if it works.
It has been tested with lastest OpenSSH server.