The default product is not displayed when editing products creating bundles

I edit a variable product and change bopo bundle so far all good.
I modify bundle item 1 and select “default”, then I choose the product that I am editing with the desired variation and proceed to save.

In the front, another product appears as default and when I edit the bundle again, the host product has disappeared. If I try to search for it, it no longer appears to select it.

what’s going on? I only have woocommerce & bopo & Elementor running on the shoptimizer theme.