I also have this same issue: https://www.frontline-collections.com/enquire-now/
I have cleared all of the caches on my site, but still have this issue. I rolled back to 1.3.2 but the issue persists.
If the page is reloaded (ctrl+f5) the captcha shows.
Interestingly, the captcha form does appear on other forms on the same site: https://www.frontline-collections.com/contact/
