Same problem here. The scrolling works with the mouse, but not with my wacom pen. And it only happens in InDesign. Photoshop or Illustrator work fine. I have contacted Wacom and wait for their answer.
Did you ever receive a response from them? I'm having the same issue now.
No resolution. I just bought a new Intuous CTH-490 tablet to work with High Sierra on OS X, so this is brand new.
Many people have had this issue with Wacom for over five years, and all I have ever found is to revert to an old, old version of a tablet driver (which was a good answer a while ago), and that the issue is with Apple, not our fault, huh?, and mostly, dead silence.
Pathetic customer service on a crucial issue.
And, since this issue wasn't a problem with some very old tablet drivers, it clearly can be fixed. They just won't do it, and there isn't a competitor.