White line appearing under selected tab title in react-tabs library

Question

I'm using the react-tabs library and I have applied custom styling, but I'm facing an issue where a white line appears under the selected tab title when it is clicked. The strange thing is that the line disappears when I click somewhere else on the page.

Codesandbox Link

Below is the CSS code for the tabs:

.react-tabs__tab {
   background-color: inherit;
   border: 1px solid #ccc;
   border-radius: 50px;
   cursor: pointer;
   padding: 10px;
}

.react-tabs__tab:hover {
   color: #0099ff;
   transition: 0.3s;
}

.react-tabs__tab--selected {
   color: #0099ff;
   border: 1px solid #0099ff;
   border-bottom: none; /* Updated line */
}

.react-tabs__tab:focus {
   outline: none;
}

.react-tabs__tab:focus:after {
   content: none;
}