Hi, on Windows, RStudio v1.3.776-2, the copy & paste (CTRL C & V) keyboard shortcuts do not work on popped out windows. Copy and paste does work by right-clicking the mouse. The trouble is only on popped out windows. I tested on two Windows 10 computers, and it occurs on both of them.
After updating to v1.3.776-2, the first time I open any project, all source panes are closed. If the project had any untitled sources, I think they went missing in the update too, I don't see them anywhere.