I understand why you have issues! loading a hundred maps on a single page is going to be slow and really not something one want to encounter..
I think that rather than this being an issue with ACF it’s an issue of architecture. Do you really need all of these at an options page? It would seem a better solution is to create a custom post type and place a single map for each post. Then you will only load one map for each post in admin. There’s also the advantages of being able to utilize wp_query for either simple queries or to fetch only specific maps easily. You’ll also get a much more approachable admin interface with search capabilities, ability to sort by date etc. etc.
My suggestion is thus to not try to patch up a leaky ship but change it completely instead.
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