Thank you for your support all this while. The issue is now fixed in the latest update of InDesign.
Please upgrade to the new InDesign 14.0 from your Creative Cloud Application.
If you are unable to see the update yet, click on the menu (three dots) on the top right corner of Creative cloud app and click on “Check for App Updates”.
Let us know if the issue is resolved for you in InDesign 14.0.
InDesign TeamHD commented
Same here. MBP 2016 Touch Bar, 16 GB, 3,3 i7, 18A336e Beta.
Thank you everyone for your continued patience! Apple just released the macOS High Sierra 10.13 Supplemental Update. This will fix the cursor issue with InDesign on macOS High Sierra. Please go to the App Store to update.HD commented
Same here, even without GPU graphics.
High Sierra GM, 2017.1
We also have the very same issue on an 2017 iMac with Sierra and GPU activated.
Superannoying, to put it mildly.