Did you add this through a third party plugin? If so, it would be best to ask their support with regards to this issue.
Otherwise, you can try this CSS:
@media (max-width: 768px) {
.inside-left-sidebar aside#text-10 {
position: static !important;
text-align: center;
margin-right: auto;
margin-left: auto;
}
}
Though, it’s more ideal to fix it through the plugin if that’s how you added it.
Hope this clarifies!