Hey James. Thanks for the heads up there; that’s a weird issue that I don’t recall seeing yet. Any chance you have another plugin running that could be conflicting? It may be the theme (and I may be able to get a dev to provide some guidance on how to fix it if so), but I’d try deactivating your other plugins first in case one of them is the culprit. Similarly, does the grid show after changing to a different template under Settings -> The Events Calendar, or is this consistent across all templates?
Let me know and we’ll do what we can from there. Thanks!