Text Tool, Selection, and Properties Panel Problems in InDesign CC2019

After upgrading to InDesign CC2019 and resetting my preferences, I've been having problems with the text tool and selecting objects in some of my .indd files.

One problem is that I am not able to select the text tool with a keyboard shortcut. Here is a gif of me simply pressing "T" a few times. The cursor changes for about one second, then changes back. The tool bar shows that nothing actually changes. Clicking the text tool on the tool bar will to change it, but only after InDesign freezes for a couple seconds.

I am also having a similar problem with selecting objects. While the properties panel is open, sometimes InDesign just freezes for a couple seconds when I select different types of objects. Here's a gif of me alternating selecting text and a shape. InDesign freezes the first time I select text, and the second and third (and all subsequent) times I select the shape. I can reproduce this pattern every time.

How can I resolve these issues? I am on Windows 10, if that helps.