Discription and Review tab on Products

Hello,
I am having trouble with the text in the Description/Reviews area at the bottom of this page.
Glass Cleaner
I’m not sure at what point the text or tabs got like this.
As you can see the “Reviews” word is tucked behind the Description tab covering the “R” a bit.

I can see this area where the problem is:
.woocommerce div.product .woocommerce-tabs ul.tabs li {
margin: 0 -5px;
}

Is this a problem with WooCommerce update recently? Or is this something I could have done on the front end?

Thank you!