Try to add the following code snippet to the Custom CSS area in Theme Settings to fix this issue.
.basel-fbt .basel-hover-alt.product-type-external .btn-add,
.basel-fbt .basel-hover-alt.product-type-external .price,
.basel-fbt .basel-hover-alt.product-type-external .wrapp-swap,
.basel-fbt .basel-hover-alt.product-type-grouped .btn-add,
.basel-fbt .basel-hover-alt.product-type-grouped .price,
.basel-fbt .basel-hover-alt.product-type-grouped .wrapp-swap,
.basel-fbt .basel-hover-alt.purchasable .btn-add,
.basel-fbt .basel-hover-alt.purchasable .price,
.basel-fbt .basel-hover-alt.purchasable .wrapp-swap {
height: auto !important;
line-height: inherit !important;
overflow: visible !important;
}