Blank white map - Vantage Google mapsupreme display error
I've recently purchased and installed the Vantage Google Maps plugin, I've installed it on the front page but every now and then (twice a day on average) I'll visit the homepage to find a blank white map with only the border showing. This is without adding any new listings.
Going into the back end and refreshing the Lat / Long & Listings solve this but surely I shouldn't have to keep checking this?
Site is directory.brentbook.com, hope you can help.