Curcy + AIO side cart

Regarding pro curcy + pro AIO cart @ http://www.lotrarts.com

1.
I set the webpage default currency to display USD with option to change to AUD however in curcy i forced the cart and checkout to display AUD so all payments are processed in AUD

This configuration appears to cause an issue for the sidebar cart when the webpage is displaying USD

“Notice: Trying to access array offset on value of type null in /woocommerce-multi-currency/frontend/price.php on line 432”

If proceed in the sidebar cart to ‘Order Review’ it displays the correct pricing in AU however when proceeding further to ‘Payments’ by Paypal the popup loading paypal appears to fail

I attached 2 example images

Example shop:
https://www.lotrarts.com/books/novels#filter/tolkien-other
Example product:
https://www.lotrarts.com/collection/the-hobbit-1999-poems-first-impression

2.
Can Best selling products be hidden from the sidebar cart