After updating to the latest Ps CC 2018 minor revision I appear to have a strange issue with the left hand side Ctrl+Z ("undo") combination. Basically, it no longer works. What it's doing is changing to the move tool when I press and hold the left hand Ctrl key - and then completely ignoring the press of the "Z" key - BUT - only with the left hand side CTRL key. Using the right hand CTRL + Z key activates the undo function as expected. Any ideas anyone? Have tried a prefs reset and this is occurring right after a reinstallation of the program to fix another problem.