Hi there,
Thanks so much for taking the time to report this, and for the clear description. That was really helpful.
You found a real bug. Clearing the Latitude or Longitude field left the marker with an empty value for a split second, and the map preview couldn’t handle it, which is what caused the grey error box. It only affected the editor preview, so nothing on your live site was harmed.
This is fixed in version 1.0.5, which is out now. Please update from Plugins in your dashboard and give it another try. You’ll be able to clear the field and type a new number freely, and if a value is ever out of range the marker just shows a small notice instead of breaking the block.
If you already saved a page while the block was in that broken state and a marker looks off, open the page in the editor, select the marker, and re-enter its coordinates. If anything still looks wrong after updating, just reply here and I’ll dig in.
Thanks again, and happy mapping!
