When using "each" over either an object or an array and a null value is encountered, "unless" will destroy the context, replacing the null value with an empty object, and dropping parent access all together.

Here is a reproduction test case: https://jsfiddle.net/r33cjjb2/3/

To aid seeing the issue, the failing case renders the following inline: !!!FAIL!!!FAIL!!!FAIL!!!FAIL!!!FAIL!!!FAIL!!!FAIL!!!FAIL!!!FAIL!!!FAIL!!

Looking forward to seeing this fixed. It is a real pain in my @$$ atm. Otherwise thank you for a magnificent tool.