Why does InDesign have so many CEP HTML Engines running at once?

I've beens struggling with InDesign crashing pretty much constantly over small things like copy-pasting, scrolling, saving, exporting, or deselecting text boxes. It will work for an hour or two at the most, and then it takes 30 minutes of crashing and relaunching to export a PDF of the final file. Then I have to restart and/or delete the entire cache manually to get it to work again. I'm working on Windows 10, with everything updated. (For the record, I've tried updating, down-grading, uninstalling, and reinstalling InDesign, CC, and pretty much every single Adobe product on the computer. I've swapped out cables, updated GPU drivers, tried both the "Design" and "video game" version of NVidia's driver, and dozens of other things. Nothing helps.)

Anyway, because this is an ongoing thorn in my side (more like a lance in the gut), I've started monitoring the Task Manageer to see if there's something funky going on. Here is one such funky thing: 15 Adobe CEP HTML Engines going on at once:

Is this normal? It doesn't feel normal.