I have observed that subsequent to updating my Metronic version to the latest release, there appears to have been a change in the visual presentation of a button. Regrettably, the altered appearance of the button is not aligned with the expected aesthetic standards.
Sorry for the late reply.
Please double check the recent Metronic v8.2.0 responsive datatable toggle buttons here. As can be seen the toggle buttons look good. Probably its related to your updated code. Have you tried it with the original v8.2.0 code ?
if you need any further help please let us know your Metronic version, framework(HTML, react, vue, angular) demo and build method(gulp or webpack).