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Vertical Scrolling on Safari loads only next 2 items

I have switched to the new responsive engine and everything is working great. However when using safari on an apple mobile device, the vertical scrolling only loads the next two items at a time. Is there any way to resolve this so that it could at least load the next 10-20 items as a minimum? It is not good in its current format for the UX.

Please help as the repeating group is the core function for my app and this is killing the experience.

Anyone able to help on this or advise on a way to fix this for Safari on mobile?