QT5 QTWeb rendering is not right on Fedora 32

We are using QTWebEngine to create authentication page in out app, and when we are using the application the webpage will be rendered which will OKTA authentication page, you can use the same authentication page and try to redenr it using QTWebEngine.

when we are opening the page the password and username  rows keep flickering in an unusual way.

One Ubuntu and OpenSuse it was working fine.

Please could you take a look?

To repro it,

please try to use the app attached and then run it on Fedora32.

input at the first page :admin@zapplinuxtest.com

and it will take you to next page, give : Admin@123

and then it will take you to next page where you will see an OKTA page which is supposed to ask username and password. it will be flickering. 

Build : https://drive.google.com/file/d/1FKU7iDrzoCxyO41aLywTqS0zduaWeLuT/view?usp=sharing