The fix for this issue is now available in the latest update 14.0.2 of InDesign 2019.
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, click on the button to update to Id 14.0.2.
If you face any problems with the new update, do let us know in the comments.
https://helpx.adobe.com/indesign/kb/fixed-issues.htmlJeremy supported this idea ·Jeremy commented
The flyout disappears as I'm scrolling, sometimes immediately, sometimes after 5-10 seconds. Very frustrating and time consuming while trying to work on projects when you are constantly battling the disappearing flyout. Forced to use the Adobe Fonts website which takes away from what would otherwise be a huge time saver being able to preview the fonts in real time as intended.