Switching the theme from Material.DARK to Lumo.DARK is causing display issu

Please find the attached screen shot to see the issue I am talking about.
Also attached working code, render.zip has self-contained spring boot App.
Please let me know if any further info is required.

18326010.zip (7.71 KB)

Hello. I was able to replicate the issue with your project (based on Vaadin 14.1.3) and found it has been fixed in Vaadin 14.2.1.

Verified, working with 14.2.1.
Thank you.