Rstudio free desktop preview 1.2.1329 - can't select text in editor window

I just upgraded RStudio desktop IDE from 1.2.1327 to 1.2.1329 and can no longer select text in (at least) the editor window. Click-drag does not select text. Double-click does not select text. Editing is almost unusable.

The behaviour survived a restart of Rstudio and a reboot of the computer. Other programs were fine.

I reverted to 1.2.1327 and the problem disappeared.

I am running the Ubuntu 18+ versions of Rstudio.
My computer is running Ubuntu 18.04 64-bit.

I opened an issue on Github https://github.com/rstudio/rstudio/issues/4488#issue-423513991

(Gary Ritchie)[https://github.com/gtritchie] was unable to reproduce the problem.

Is anyone else having this problem?

Thanks,
Ross

I have just reproduced this problem on another computer running Ubuntu 18.04 - so it's not entirely idiosyncratic.

You can try resetting RStudio's state: https://support.rstudio.com/hc/en-us/articles/200534577-Resetting-RStudio-Desktop-s-State

If that doesn't help, the following could be helpful. Try launching RStudio, and then executing the following in a terminal:

lsof -p `pidof rstudio` | sort -k 9,9

This should print out all of the files (including shared libraries) loaded by RStudio.

My apologies for not responding earlier - I have been unavailable all week. I see the issue has been sorted out on GitHub by more skilled people than me.