Paypal Multi Order Shipping - MacOS Safari Review/Pay not showing up?

[dictoresno]

usually when I go to pay, I have to scroll down and the buttons to review/pay are slightly hidden, as if the page isn't rendering correctly. today, the button was totally hidden however I was able to click in the blank space and able to click the unseen button and complete the label. however, on another shipment, the button was totally hidden and unable to click anywhere. first screen shot is on Safari, second screen shot is on Google Chrome, where the button was visible.

first time ive had it totally hidden, and I had all adblockers turned off on Safari. anyone else on MacOS have this issue?