You've made an update recently so this is better, but it's not there yet.
When using a mobile device to submit an event with the Marketplace Businesses module active the user experience to
"Find a location" lands on a screen that does not function well. If you are lucky the venue will display so you can choose it, but the box is not tall enough on an IOS iPhone 8. When you type in the search area, again it might display part of one venue from the search. The user is limited to the choice displayed and no way to navigate the remaining venues in the system or search.
Customer support service by UserEcho