Embedded r dumps raw LaTeX

[kellino]

I have the inline display of LaTeX output working beautifully (this really is a lovely feature):

but I've run into trouble when trying the same thing when using the r interface. The first time I used it, it triggered an error which prompted me to install the 'Hmisc' package (https://cran.r-project.org/web/packages/Hmisc/index.html). Now, instead of throwing an error, it dumps raw LaTeX into the current buffer.

I've no emacs lisp foo at all, so don't even know how to go about solving this. I'm using Emacs 27.1 on Ubuntu.