Thank you for your patience all this while.
This issue is now fixed in the latest update (Id 14.0.1) of InDesign CC.
If you are unable to see the update notification yet, open the menu (three dots) from the top-right of Creative Cloud desktop application and click on ‘Check For App Updates’.
Once the update button is shown against InDesign CC, click on the button to update your InDesign to Id 14.0.1 for the fix of the issue.
Do let us know in the comments, if you face any problem with the new update.
List of fixed issues can be found at: helpx.adobe.com/indesign/kb/fixed-issues.html
An error occurred while saving the commentAnonymous commented
My whole team are having this issue - we are all on Windows 10 and InDesign 14.0.
The Type and Character palettes are both affected, and sometimes the style palettes too. With the Character palette in particular this seems to have something to do with the way that the Typekit fonts are now included in the diaglogue rather than being a link to the Typekit website. It's so bad that we are having to force quite InDesign. Please can we have a fix ASAP! Thanks.