Forms not working in cached pages

Hi,

My real estate website has a CF7 form on every property page, as well as one in the Contact Us page.

Lately, I’ve noticed that the forms are not working properly. But even for a page where this issue was happening, the same page / same form in another language was working fine. So I ended up turning off my caching plugin (WP Super Cache) to make the forms work again. However, this cache plugin hasn’t been updated in 2 months, while CF7 has had recent updates. So I wonder if any recent changes in CF7 may be causing the issues I’m having, which are as follow:

1) for some pages, when I click on the Send button, the “sending” icon keeps circling in a loop, and I never get the “Your message was sent” message.

2) other times, I get the OK message, but the email never arrives.

As soon as I flush the cache, all pages work normally again. (The cache plugin is now inactive).

I’ve been using both CF7 and WP Super Cache for a long time without any issues until recently (at least 3 days).

Thanks,
CB