WordPress Mini cart opening at bottom of page ony on generate press template pag

Hi,
I’m running GeneratePress with GenerateBlocks Pro and WooCommerce. My mini cart is added via a GP Element (type: Site Header, displayed sitewide) using the WooCommerce Mini Cart block.
The mini cart works correctly on standard pages. However on WooCommerce product and category pages it renders at the bottom of the page below all content rather than as an overlay, and does not open correctly when clicked.
I’ve ruled out the following as causes:

It happens on category pages which have no custom template and no ScrollSmoother wrapper — so it is not a smooth scroll conflict
I tested hooking my custom product layout via generate_before_main_content instead of a template_include filter and the issue persists on both approaches — so it is not caused by my custom template structure

The issue appears to be specific to WooCommerce template pages (product, category, shop) regardless of how the content is delivered. Standard WordPress pages work fine.
Questions:

Is there a known conflict between GP Elements (Site Header) and WooCommerce block templates that causes the mini cart drawer to mount incorrectly on WooCommerce pages?
Is there a recommended way to use the WooCommerce Mini Cart block within a GP Element on WooCommerce-templated pages specifically?

Thanks