I am not sure if this is Caesim's thing or yours but when I press the O key, it bugs?
This is neither Caesims, nor my fault.
The patch introduced a new feature and with it a new key was occupied, that was free all the years before. Coincidently it now occupied a key I also used for the AdminTool ("O").
In cooperation with Gretel I changed the key for the new custom chat to "K".
The new version should solve the issue. If you have further problems, feel free to reach out again, I would be glad to help you.
Bans randomly innocent players when in bad mood.