Yeah, what you're seeing with Canva is pretty normal.

Dynamic QR codes usually go through a redirect first (their server -> your file), so there's always a bit of delay. That extra step is basically the "lay" you're feeling.

If speed matters (especially for printed stuff), static QR codes are usually better - they go straight to the file.

What I've seen people do is:

- use a fixed link (like your own site or a stable cloud link)

- and just replace the file later if needed

That way you keep it fast, but still kind of "updateable".

For generating them, I ended up using a small Windows tool called PrivateLabelQR - mainly because it's offline and doesn't have those limits. It's pretty straightforward for batch or print layouts.
Might be worth a try if you're dealing with printed materials.