Fix of the issue is now available in InDesign’s latest November’17 update.
Please upgrade to the latest version InDesign CC 13.0.1 for the fix.
If you are unable to see the update, go to Creative Cloud application and click on the context menu on the top right and click on Check for App Updates.
InDesign TeamAnonymous commented
I just started having this same issue today. Highlighting text and using the eyedropper tool transforms selected text incorrectly. I'm getting large stroked outlines, instead of the correct text attributes. It's not crashing, it's just not working correctly.