Just to check if the parsing is working correctly, what was in the IP bans just before it wouldn't add any more? Please submit your response as a private note so as to not leak IP addresses.

Thank you Master Rat.

For public record, they said:
"OK let me say this I am not doing a ban from selecting the IP I was entering them manually and saving the record. This is where it is not adding the added IP. It does add the IP if I go to view and click ban this IP. The record is then added."

Sounds like an issue with the text field on the module perhaps. I'll investigate. It may be a while before I do so as my current focus is getting v11 alpha1 out the door. This does seem like an issue that could impact multiple v10 users though so I'll try to get a hotfix out. It sounds like you have somewhat of a workaround for the time being. You could probably also type any IP in investigate user and then toggle banning on it if you need to manually ban an IP.

I unfortunately could not reproduce this issue. Are you sure the new IP addresses you are entering were not already entered? That's the only time I could get the form to erase entries is if the entries already existed.

There were no repeats, however, the recent update seems to have cured it or an act of God happened. It's working normally now.

Noted. I'll close this issue then. It could very well be a random technical issue. Please open a new issue if it happens again.