Reproduction steps:
- Create page with <maplink zoom="3" longitude="0" latitude="0" /> content and open fullscreen map.
- Pan the map for more than 180 deg. (e.g. about 360 deg.).
- Open GMap. Position is not that expected (e.g. Turkey).
Imho this happen because "Check that the first number in your longitude coordinate is between -180 and 180." (https://support.google.com/maps/answer/18539).