Hi Margaret,
Thank you for your quick reply!
WooCommerce was sending some emails, but not certain specific ones.
I went through the procedure of disabling all plugins and then enabling them one by one, to find out which plugin is causing the issue. It turns out the following plugin caused the problem:
Email Text Customizer for WooCommerce
I disabled it for now, but I’ll look into that plugin next to see if this can be fixed somehow.
Thank you!