The latest ready-for-release builds of the RStudio IDE are listed here Download the RStudio IDE - RStudio. That seems to be out of date to me. (And you can always install the latest version directly, off this page)
There doesn't seem to be a bug on this reported, would you mind alerting the developers about the issue here?
If you're unfamiliar with bug reporting on open source projects, the RStudio team created the following guide: Writing Good Bug Reports · rstudio/rstudio Wiki · GitHub
For the curious, the latest builds are listed here RStudio Branches