I'm using the standard modal implementation for an embed code for a payment form. That embed code is essentially a bit of JS that loads an iFrame.

Even though I have the modal with the embed code loaded on the same page, only when I click to open the modal does the embed code load. This causes a ~1 second delay and the modal jumps. Here's a quick video to show what I mean: https://dsh.re/2b0e9

I checked with the support team of payment provider and they said:

The embed code is actually loading on page load, but the modal library copies the element into the modal on each "click" so it has to reload the iframe each time you open the modal.

Is there a way around this? I've also tried implementing it via the ajax method, but it has the same result.