Screen Only Flashes

Wierd 1: The Database Insert / Action screen will only momentarily appear and does not stay open. Mouse clicks will momentarily open the screen but it will not stay open. See attached vid:
screen flashes.mp4 (7.2 MB)

Wierd 2: when I edit/change text in most any field, I have to click on ''tab" key first to escape the field, than hit “Save” or the change reverts back to its original state (using a Macbook Pro, OSX 10.13.5).