Hi Isaac,

Thank you for the details provided.

I tested the linked RadioButton demo on Firefox and can confirm that, under certain conditions (when resizing the browser window only on very particular resolutions), the inner dot of the RadioButton can briefly appear off-center.

After further investigation, an important thing I noticed is that this behavior occurs only on our documentation site. To be more comprehensive, when the demo is opened in a new browser window, the RadioButton issue does not reproduce when resizing the browser window - the dot is centered at all times, no matter the resolution. Feel free to test it out yourself through the below link:

• https://demos.telerik.com/kendo-angular-ui/demos/inputs/radiobuttons/overview?theme=default-ocean-blue 

In this line of thought, this finding suggests that the misalignment behavior is related to the documentation site's styling context rather than the RadioButton component itself. Moreover, the issue appears to be specific to Firefox and does not occur in the same way in other browsers like Chrome or Edge.

With the above being said, since the issue appears to not be caused by any styles of the RadioButton component specifically, we rather do not recognize the behavior as a bug in the RadioButton component itself.

Having said that, if you happen to have a specific scenario where this issue causes significant usability problems on standalone projects as well (not only on the documentation site), please provide more details about the RadioButton configuration, any custom CSS, layout, or animation settings used on your side. A minimal reproducible example would also be helpful for further investigation.

Please observe the provided information and let me know if I am missing something.

Regards,
Zornitsa
Progress Telerik