Well, just to be clear, I'm only using one monitor at a time. The problem occurs when the laptop is docked and the lid is closed and the monitor screen is active. I can change the window size to have the tabs and tablinks reappear, but it'll only fix itself when the Chrome window is 1/2 of maximized.
And, for what it's worth, I used the application a lot for the two weeks up until 3/5 and didn't have this problem at all. It just suddenly became an issue on 3/5.