But now, when I double click on it and it show the rectangle but the rectangle won't stay.
explain further and show some screenshots/video capture
weird. I assume Ctrl+T does not work either?
isolate the problem. does this happen with a fresh project, fresh solid layer?
could be a GPU issue. try turning off hardware acceleration in preferences-display if it's checked on. if that does not work, try resetting your preferences.
Thanks a lot, I'll resetting my preferences and see what's happen..
Did resetting preferences help? Are you still facing this issue? Please let us know.