This looks damn similar to the stuff I posted in march: Bug: code-editor fields show no preview
What is rendering the property textfields? The same third party component?
This isn't a dealbreaking issue, this is what everybody sees from time to time, and it stays in the back of everybodies mind as an flimsy UI experience. I do not think it is something you can fix, but it is something which you are in a better position to analyze/communicate to this third-party devs.