I found this issue with the Manutec store finder. This css fixed the issue returning maps back to their normal display.
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Google Maps API of localhost
Use this Google Maps API for localhost development versions of websites: ABQIAAAAnfs7bKE82qgb3Zc2YyS-oBT2yXp_ZAY8_ufC3CFXhHIE1NvwkxSySz_REpPq-4WZA27OwgbtyR3VcA