OpenStreet Map Plugin
probably it is about the initialisation of the map.
Difficult to troubleshoot now because we do not see the code of this plugin.
But you should initialise it like it is described here:
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1. Update Lay Theme and all Lay Theme Addons
2. Disable all Plugins
3. Go to Lay Options → Custom CSS & HTML, click "Turn Off All Custom Code ", click "Save Changes"
4. Now see if your problem solved itself
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