I also have this issue, is there some way to stop the current process. Deleting/reinstalling the plugin does not stop the process.
Thanks
Used these instructions and then followed Step 3
public_html > site-name.com > wp-content > plugins > ultimate-woocommerce-auction > includes > class-uwa-front.php > line 46 below “// Bidding Area On single product page” replace as noted above.
As Noted Above STEP 3
Find Hook “woocommerce_single_product_summary” and replace with “woocommerce_auction_add_to_cart”
Worked Perfect