When going to checkout, the word 'on' is appearing in every checkout field. Here is how it looks.
The HTML that appears is
<input type="text" class="input-text" name="billing_first_name" id="billing_first_name" placeholder="First Name" value="on">
Looking at the files this apears to be coming from the sod-woocommerce-checkout-fields.php file, but I am not sure why it is showing in the front end.