1. Are you using a custom theme or custom CSS code?
2. If you switch to an OOTB theme like Lithium for example, do these controls display correctly?

This may be related to the following 5.7 release notes:

• The Check Box, Rating, and Radio Button controls are now style profile aware. You can set the background color, the outline, and the main color for each control type using the advanced colors. If you are using custom code (CSS) that targets these controls, your custom code may no longer work.
• The ToolBar Button control's icon is also now style profile aware. You can set the icon's highlight, destructive, base, and base secondary color using the advanced colors. If you are using custom code (CSS) that targets the icon of this control, your custom code may no longer work.
• https://help.nintex.com/en-US/platform/ReleaseNotes/K2Five.htm

If using a custom theme, you may have to update your custom theme or custom CSS code to resolve the issue.

Or perhaps see if you can create a Style Profile and use it instead:

https://help.nintex.com/en-US/nintexautomation/userguide/5.7/Content/Create/StyleProfile/StyleProfile.htm

Hi @Thriveni 

Has this reply solved your question? 

Hi,

we have updated our own custom css, but it was completely re work for my developers since there is drastic changes in css classes.

Best Regards,

Thriveni