[Plugin: Advanced Custom Fields] ACF Repeater Field losing fields on update

I’ve got a pretty hefty repeater field with a number of subfields underneath (including a nested repeater). When I first input the data into the page, everything saved fine. It’s all in the database in post_meta.

Now, whenever I save that page, in the database it gives this:

repeater = 1
repeater_0_subrepeater = 4

Those numbers should be 4 and 9 respectively, and I see all of those fields and data on the post edit page. When I save the page, it only shows me the first 4 of the first field, even though the rest of the info is in the database.

Any ideas?

https://www.ads-software.com/extend/plugins/advanced-custom-fields/