Calling wc_get_template with null value for $args causes problems with other plugin(s)

[woutervanvliet]

Describe the bug
wc_get_template gets called with a null value, rather than array, a few places in the code. This causes problems with another plugin that has a strict type declaration, expecting $args to be an array.

To Reproduce
Steps to reproduce the behavior:

• Have Reepay Checkout Gateway installed
• Open an order in WooCommerce
• Click the button to print an invoice, receipt or delivery note
• Experience that an error is thrown expecting $args to be an array

Expected behavior
No error ;).

Isolating the problem (mark completed items with an [x]):

• [ - ] This bug happens with only WooCommerce Print Invoice & Delivery Note plugin active
• [ x ] This bug happens with a default WordPress theme active, or [Storefront]
• [ x ] I can reproduce this bug consistently using the steps above

Additional context
I'm not sure which plugin actually is doing something wrong, but my best guess is actually both. I feel confident that $args should be an array, thus making null not a valid value (see https://woocommerce.github.io/code-reference/files/woocommerce-includes-wc-core-functions.html). But perhaps a type declaration is a bit too strict for the WordPress ecosystem.