Trouble while submitting translations from a translation request

A couple of days ago I submitted a translation in answer to a request, and after hitting the 'submit' button I was sent to a translation by some other guy, who was working on the same request at the same time.
My submission did not appear anywhere, and all my work got lost. It looked as if I had done nothing at all. Needless to say, I was less than happy about that.

Now today I answered another request, and this time I was sent back to the main page of the lyrics. Again all I had typed apparently failed to register anywhere. No one seemed to work on the same request at the time (i.e. I saw no other translation for these lyrics appear after an hour or so), but of course I have no way to know if somebody actually did.

I suspect there might be a problem when trying to put a second record into de database while the previous request on the exact same song and language is still being processed (i.e. between first request submission and database insertion completion). Maybe something can go wrong if someone starts answering a translation resquest and then change his mind, leaving the database in a weird state with a half-filled translation record or something?

As a temporary safety measure, when answering requests, I decided to submit a dummy text first, and work on the real translation from the 'edit' interface.

Would it be possible to have a look at what happened ?

Thanks in advance.