Just thought I would post this as maybe someone else is being driven crazy about it.
I noticed that in some of my projects ‘Cut and Paste’ shortcuts on my keyboard stopped working which drastically cut down my working speed.
Cut n Paste from my keyboard was working though on other apps on my PC.
THE ANSWER, if this is happening to you, turn OFF the virtual keyboard in your transport panel. Hey presto, Cut n Paste will work again.
If you are unsure how to do this, right click over the transport panel.