Thank you for your patience all this while. Fix of the issue is now available and can be downloaded using the link below. https://helpx.adobe.com/indesign/kb/Script-UI-dialog-issue.html . You may click on the link and follow the quick steps to fix the issue in latest 14.0.2 update. Let us know if you face any problem with installing the fix.
-InDesign Teamalexdauchez commented
Hi Adobe, please fix this as it breaks some of the scripts we use in a work process !
This is a macOS10.13 issue, specific for some Intel GPU cards. Apple has fixed(partially) this issue inside macOS10.13.4 released build.
Following are the workaround for resolving this issue.
1) Update your mac machine to latest macOS10.13.4. Here, Apple has fixed this issue to some extent. You will face very less number of rendering issues.
2) Disable GPU preview and set display performance as typical.
Once you have updated to macOS10.13.4 .You might still face some rendering issues. Since, Apple has not fixed this issue completely.
Please switch off GPU rendering for these cases and report a separate post for tracking.alexdauchez commented
Can you confirm this GPU issues it has been resolved in the last 10.13.4 beta as some say in the Illustrator thread ?