MergeBlock with "clear"

My template:

I call $TBS->MergeBlock('fin','clear');
But anyway error is occured
TinyButStrong Error (Array value): Can't merge [fin.activs] because sub-item 'activs' is not an existing key in the array.

It's normal behavior or not?

Hi Andrew,

This behavior is not normal. This is a bug you've discovered.
I'm fixing it. Let you know when it is ok.

In new release option 'clear' work fine!