When I hit CMD+A to select all text in the editor, Edit in the menu bar will flicker blue for a quick second, but nothing else happens. This hasn't always been the case - only within the last few weeks, maybe. I checked and CMD+A isn't assigned to any other hotkeys. Per another post I saw, I turned off the "Override IDE Shortcuts" in Settings >> Tools >> Terminal, but that didn't solve the issue.
I am running the latest stable build of PyCharm, 2019.1.1, on macOS Mojave v.10.14.4.