Hey guys.
I use groups and nested repeaters a lot.

Can you please make some doc on that.

Here's my latest issue:

ACF hierarchy :
Brewing (group) 
- Methods (repeater)
- - Amount (repeater)

Field names:
brewing (g)
brewing_title

- brewing_method
- brewing_method_title

- - brewing_amount
- - brewing_amount_title
- - brewing_amount_desc

Code:
I've tried below examples 

Example 1
<h3>{{current.post.cf_brewing_title}}</h3>
{% for item in current_post.cf_brewing_method %}
    <p>{{item.brewing_method_title}}</p>

    {% for child in current_post.cf_brewing_amount %}
        <p>{{child.brewing_amount_title}}</p>
        <p>{{child.brewing_amount_desc}}</p>
    {% endfor %}
{% endfor %}

Example 2
...

    {% for child in item.current_post.cf_brewing_amount %}
...

Example 3

...

    {% for child in current_post.item.cf_brewing_amount %}
...

Example 4

...

    {% for child in item.cf_brewing_amount %}
...

It works 🙌