Hi,
I have the same behaviour like Zakko in #61486 04/22/20.
If I use shortcuts with CTRL key and than press any other key, at first the character pressed before with CTRL key appears.
For example when I press CTRL + C (copy) and than press a key, C character appears in the window instead the rigth key.
This occurs by using any CTRL combination shortcut, like CTRL + A, CTRL + V, CTRL + X etc.
Now i have installed 14.0.0.1961, but I tried also PL/SQL 13 and 12.
I tried re-install PL/SQL, more times, cleaned the registry and application data, but this problem persists.
Gabriela