invalid token when using memcached

Hello

I’ve been using jetform builder in a website for a couple of years now. The forms are used to collect leads: when a vistor fills a form, it creates a “lead” CPT that is saved as draft, and then, using a webhook plugin, the CPT content is sent to a remote system.

The forms were working OK, but had to be kept in version 2.1.4, because “lead” CPT creation stopped working after that, and, later on, due to performance issues, memcached object cache was activated on site. However, whenever a form is filled, I get “Invalid Token” and no data is collected.

Maybe it’s the CPT creation that is not working (again), or maybe something else.

Can you suggest a solution for this?

Thanks in advace