Clicking "Add to Cart" on a product page on homedepot.com brings up a sidebar that doesn't finish loading. I thought maybe it had to do with content blockers because the part that doesn't load is about adding product protection, but it also happens in vanilla Safari.
Allstate Protection Plan section should load text as well as a button to decline coverage. Without that button, you can't complete the process of adding the item to your cart. See attached screenshot from Firefox. 
1.0.0
Tahoe (26)