I have a tiny form working for 2 months already. You can find it in http://www.8bitsex.cl/play When users access to this link through Instagram BIO link, the form doesn’t work properly and says that annoying message asking the users to refresh and try again. It also happens from different mobile devices or tablets. Last month it was workin much better and now is giving me a lot of problems. I already tried desactivating the CSRF protection and that doesn’t seem to fix the problem.