I’m having this issue while creating a new event in the backend. Some venues show up in the list, but not the one I’m looking for. The venue is published and shows up fine in the venue list and in the front end for existing events. The venue is “Retrofit sip-n-seat” at visithartsvillesc.com/events/.
WP 4.9.8
The Events Calendar 4.6.22
The Events Calendar PRO 4.4.31
The Events Calendar: Community Events 4.5.13
The Events Calendar: Filter Bar 4.5.7
I think the site was updated to WP 4.9.8 on Friday of last week, which may be the root of the problem. I didn’t work on the site over the weekend to notice.