I’m having an issue where anonymous users cannot enter full venue information. All that shows up when they make a post is the venue name. When logged in I can submit full venue information. It seems like a permissions issue.
Both need to be in sync: for example, if you are using/plan on updating to Community Events 3.6 you ought to use Events Calendar PRO 3.6 and The Events Calendar 3.6.
Is it possible this stems from your modifications? Are you in a position to test on an alternative installation without any such mods?