Hi there,
Thanks for reaching out. I’m sorry to hear that you’re having issues with the Venue submission form. I will try to help you get this sorted.
I am not seeing the behavior you describe on my local test site. Because you require users to be logged in to submit an event, I am unable to take a look at what’s going on in your particular case.
Could you try temporarily switching to the Twenty Seventeen theme and disabling all other plugins to see if there could be a theme/plugin conflict causing the issue? You can read more about this process here: https://theeventscalendar.com/knowledgebase/testing-for-conflicts/
Let me know how that goes.
Thanks,
Sky