Hi Gavin,
I don’t want to post the event URL publicly since a lot of customers on the forum are working on behalf of clients and don’t want to expose them – but I see the map on map view and also the map on the single event page for an upcoming event running Jan 20 – Jan 21 are working just fine.
Can you confirm if this is still a problem and if so provide a specific URL that illustrates the issue? Can you also confirm that in addition to deactivating all other plugins you switched at the same time to a default, unmodified theme (and if so did that have any bearing on this)?
Last but not least, please post your system information as provided at the bottom of the Events → Help admin screen in case that provides any useful insights here.
Thanks!