Can't submit results for OTW/Natas

Not sure if this is an issue just with Natas or not, but it seems to be impossible to submit tokens from http://natas*.natas.labs.overthewire.org and have it actually work. It works for `natas0`, sometimes, but the rest either end up logging you out of WeChall or just telling you the answer is incorrect. If you try to manually submit the password you also get told that it is incorrect.

The SSH boxes where you can run `wechall` do appear to be working fine.

Also not sure if this is a WeChall issue or an OTW issue, but it'd be really nice if someone could take a look at it and fix it or tell me what I'm doing wrong...

As a side note, submitting `natas0` again has changed the last solved times and put me as the most recent solver despite having initially solved it years ago.