I have to say that I'm quite often reading about that issue, also with other coins.
What I mean is that the same passphrase generates a different address (when entering it on different wallets, like web and desktop).
It may be on the users side, but I think devs should look into it. Maybe there's really a bug (with some specific passphrases only etc.)..
hashes rely on EXACT characters. even an extra space or double space creates a different address.
There's nothing any dev can do about it. There will always be some casualties from user error. guaranteed.