Featured image not Saving

Can you be more explicit in reporting your issue. How did you map your featured image, what version of the plugin are you using, how are you creating your mapped posts?

Work fine with 5.3 with same configure. So I downgrade it, download from https://github.com/aurovrata/post-my-contact-form-7/releases/tag/v5.3

understood, this is now fixed in v6.0.4