Hi there ?? A quick suggestion. Your plugin uses Kube which loads styles like this.

.title, h1, h2, h3, h4, h5, h6 {
    font-weight: bold;
    color: #000000;
    text-rendering: optimizeLegibility;
}

It isn’t really appropriate for a plugin to be targeting tags like h1 with no prefixing to make it specific to the plugin content. There is a high probability that global tags like this will interfere with theme styling.

All the best with your plugin.