Hi there,
I might have a similiar issue like in this thread: WP Cost Estimation & Payment Forms Builder - No Orders
There are no orders shown or the page isn’t even loading. Nevertheless I can see that there have been orders in the statistics of the form.
But this only happens for one specific form. I have a similiar one that is still showing orders. So my guess is a performance issue caused by too many orders.
This is what the console says: