Play in studio, copy the default chat and paste in back in to edit it and preserve changes. (as usual)
Change in the client settings module the default font from the sans to Garamond. When typing letters like a for instance, in succession i.e. aardvark, it will tilde the first a instead of adding another, ãrdvark.
Could this be a bug report even, I wonder. Hopefully it just can be scripted around?