Stops working

This is the second time this has happened on different sites. I love your forms interface and really want to use them, but I had a bad experience and stopped for several months and went back to contact form 7. About 3 weeks ago I tried again thinking maybe I’ll have better luck. I tested a few quick contact forms and they worked perfectly – got my emails within seconds. I went ahead and put together a more complicated form and tested that MULTIPLE times and it worked every time. I just pulled up the site to test again and it is working about 1 out of every 8 times. It either does nothing or it looks like it’s working but no “success” alert and I get nothing. I have done absolutely zero to the website since it was working 2-3 weeks ago and now isn’t. Any ideas? The site is http://www.CDAHomesForSale.com

https://ww.wp.xz.cn/plugins/caldera-forms/