What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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I tested the app again and it does not freeze anymore but it does appear to only load the markers and not the map:
I forwarded this issue to our development team to see if this is something they can resolve. We will update you in this thread as soon as we have any further information.